I made a few customs back when they were a thing, I am only 90% sure that some of the ones I have were made by me, is there a way to check? I was thinking of maybe making a custom shop because I heard you could still ask for ones you have made. Also how exactly do you do that? Sorry I'm just coming back so I'm pretty out of the loop rn.

I would say your best chance is messaging Krin and asking him about it. A few people have on-going custom shops, and from what I know, you can still get the ones you have made by messaging him. I'm not 100% sure since I only joined recently