there are members here that sell good quality pellets. i would contact Sandi, she sells Oxbow.
as for hay, it boils down to what hay your chins will eat. some chins will turn their noses up at one brand of hay, but love another. I feed my boys a mix of Oxbow timothy and Oxbow orchard grass, as well as a timothy/alfalfa/brome mix that i bought in a mini bale from my local vet supply store.