i know they are pricey but with gas there & back i can get 3 hoppers for $8 at petco while it's about 100 mi to the closest rodent breeder i can find on craigslist and no one seems to be selling leftover feeders locally
also I looked at most of those sites most are $40 to ship.... except 1 http://southfloridarodents.com/ but yea no idea about them i did find info on fauna and yeawhy he try to do those things also the site seems to have alot of names