I just tried to give the version you have on svn a whirl but I can't get it to do anything. I can't even get /fr to do anything. /ace list does list the addon as loaded though. On svn I saved each file (there are 3) to a folder called FreeRefills in my addons folder. Do I need to embed anything?
Thanks for the link - I checked out the version on svn using Tortoise. You say above that it works for simple items sold in singles? I tried adding an item to the DB using /fr add [itemlink] 5 but I just get errors like the ones below.
Core.lua:47: bad argument #1 to `pairs' (table expected, got nil)
Core.lua:25: attempt to index global `RefillsList' (a nil value)