I placed an order with Cold Blooded Café recently because my local mouse & rat suppliers have been running a bit short since one of the larger vendors in the area folded last year, and they're having a special sale on jumbo rats. I also picked up smalls and mediums.
The order shipped on a Monday, arrived Wednesday with everything still frozen solid and well-packaged in thick plastic bags, and the feeders looked and smelled clean.
I fed off 5 small rats and 3 jumbo rats so far, and the smalls are all 65-80 grams so they were on the higher side of their advertised weight of 40-84 grams. The jumbos ranged from 300-350 grams, so they were well within their advertised weight of 275-375 grams.
http://www.ColdBloodedCafe.com/ is their web site.