If you actually have a graflex back, you need the roll film holder that also fits the RB series of cameras - they're hard to find and usually expensive when you do - if you look carefully on ebay, you'll sometimes find one that's not identified (but can be spotted by carefully looking at the photo) as such and which therefore goes cheaper.
If you have a spring back (graphic back) you need a Calumet (C-2, I believe) holder.
If you have a Graflok back (aka International Back), there are graflex roll film holders (the older 22 & 23 and newer RH-8, 10, 12) as well as those made by other manufacturers. The Graflex ones shouldn't run more than $50.
You could also just buy a Graflok back for your Anny - figure $75-100 - and then use the graflex made roll film holders.
Dan
PS - I have a roll film holder for a Graflex back that someone inexplicable (given the relative scarcity of one vs the other) hacked to make it fit into a graflok. I haven't looked at it to see if I can re-adapt it for a graflex back but it might be possible.