Cody, couldn't say who makes a slim bump stop. Try Prothane or Energy Suspension. I ran a 2/3 key/coil drop and it was pretty firm. Like most have said, the bilsteins are a firm shock. Maybe try a softer shock like the BellTechs? Personally, I love my 5/5.5 and I didn't really care for how it rode with the 2/3. Have you done the free travel mod? That may really help. Also, I just completely removed my front bump stops when I was 2/3 so that is an option. I have been hearing good things about Z71 bump stops up front so that may be something to check out as well. There are a lot of things that can cause it not to ride how you'd like, but try a few different parts to get the ride you want.
I'd really recommend getting with Tony (NorcalSS) as he may have some suggestions that could really help you out.
Alex