Quentin asked me for a pair of the orange, and I figured I'd save some money by using some of my Carnival Tickets, but it turns out only about half of the set is available in the shop, and orange wasn't one of them. Maybe it's intentional, I don't know, but it seems weird to me that half of the colours are arbitrarily unavailable.

For the record, the missing ones are:

[edit] reminded me that some other balloon wearable sets are only partially available, so I've listed the unavailable colours below:

Let me know if there are others I've missed; I was using SubetaLodge and may have skipped over something.

I noticed that too but thought it was somehow intentional. Also, I believe some balloon hats and balloon bears are missing from the carnival shop as well.

Yeah, I think I had noticed that a few days ago, too. Give me a couple minutes and I'll add them to the OP.

I just wanted to update you guys! This was actually intentional and they will be added back. See the thread below (it is locked but you can still read it).

Bear Balloons - only some in Carnival shop