I'm trying to get as close to this as I can manage with Subeta items.
The choices are...
Using the Yellow Nazar. (Which I've been using for months.)
Using the Ornate Amber Bottle.
EZIO, WHY ARE YOUR EYES THAT OFF AMBER/GOLD COLOR WHEN YOU'RE OLDER. I know why but still. INFURIATING MAN. I think it's because the HA doesn't have the right nose... at all. At least partially.
Ideas? Must be gold/amber.

Close but not quite. Thanks. <3

Must rip his eyeballs off, then
GASP HOW DARE YOU--

No problem
What about There's a bit of eyelash but ...
It's hard to tell if is gold
I'm probably not helping much, am I? xD I'm not familiar with the character it's kind of hard to tell exactly what you're looking for. Plus there's just not many gold eyes :c And if there is it has a ton of eyeliner or something.
Maybe: (looks a bit yellow/brown)
You can also look ">https://subeta.net/forums.php/read/10876/List-of-all-Makeup-updated-60614/1/">here on the list of all the eye make up.
Did you try that new pencil?
I know it's supposed to be "Girls eyes' with the lash things, but they almost look like crinkles, the way he has his face wrinkled in that image? I don't know if you can make it work (you might be able to cover it with dirt/facial hair too) but those were the first eyes I thought of for some reason o_o
Tried it, came out way too sharp cornered for my liking.
I'm considering a CW right now, let me tell you because I think the main reason it looks so odd right now is because I'm so used to the laugh lines and other wrinkles Ezio has at that age. (And I love them to bits.)

I think I have the amber one of those mascara brushes...

I'm still poking around, so to speak. Who knew eyes could be so aggravating? I'd go the CW route but that's getting into the "No base features" bs.

I know absolutely nothing about the world of CWs but the only thing I can suggest there is to get your hands on one of those foregrounds that change the color of the whole thing? Like a quick look has found me: You could layer something like that (or others) over pre-existing gold eyes to create a different shade. It will interfere with skin tone though :c
Were it not for the skintone changes and rarity of some of these particular items... it's a very good idea though.

Since you mentioned having your own CW made, you could do something similar to these colored foregrounds. I don't know if it would be allowed but you could have a certain color over the eye area and a light, barely noticeable color over the rest of the skin. That way it wouldn't mess up the skin tone that much and when layered over the gold eyes of your choice it could produce the color that you seek.
It's kind of iffy if that would be allowed, but since I've seen other CWs that enhance pre-existing subeta things (like a CW of muscles make the regular ha base look more defined), this would just be an eye enhancement and not actual eyes :P
Other than that I'm all out of ideas u_u
It's too close to a base feature and Subeta's weird about that because God forbid we should make our own eyeballs.

That's a shame. I took a look at the rule and it seemed like it would be acceptable.
But then again I have no idea about CWs so maybe I'm missing something.
Nonetheless here's to hoping subeta comes out with more affordable gold eyes that may be closer to what you seek. Cheers <3