So I'm trying to get the Lights of Sprites Scroll, I was wondering if I could just buy the three scrolls I need instead of fighting for them, I already have the PSR one but it's really boring to get all those fights ahhh Is it possible, I wonder?

100%. The Genetech lab won't know the difference when you combine them and they're available on shop search. :P It's cheaper to buy the scroll pieces than the finished scroll.

yip they are pretty cheap in the shops.