If you just need to do scrolls you can purchase the $20 scroll bending
attachment for Harbor Freight's compact bender and build a base for it very
easily. Here's the bender:
There's also an older type of scroll jig that looks like a ready-made scroll
that you bend your scroll around but I can't find a picture of one for an
example and I've never used one so I don't really know much about them.