The answer is maybe and yes.

It all depends on the gauge you are looking for. We had quite a discussion about 16ga paper hulls a while back. Almost placed our own special order. In the end, Mike Graf ordered them and now sells them through his website: http://www.grafs.com/shotshell/414

Grafs also carries 12ga paper hulls. Ballistic Products makes a roll crimping tool that is worthwhile: http://shop2.mailordercentral.com/bpicart/searchprods.asp

For cards and wads Circle Fly is very good: http://www.circlefly.com/html/products.html

I am sure there are other vendors. Someone should offer a suggestion soon.

Pete