I’m also glad to hear of another alternative with a good selection. I’ve used Rodent Pro for years because they consistently have the range of sizes I need and shipping is flat rate $29. However as others have said, their packing leaves something to be desired. Repackaging to vacuum seal can sometimes be like fitting puzzle pieces into a bag.
I’ve also used Layne Labs, but the shipping is only worth it on large orders. I’ve also had issues with them having large feeders for my boa and the Burmese I used to have. Years ago they used to lay out the rodents flat and vacuum seal, but my last order (4 months +/-) just came in heavy duty bags. Better packaged than RP, at least. On the plus side, there has always been a large chunk of dry ice left over on even the hottest summer days.