Another former Layne Labs customer here. I'm in WA and the shipping was too crazy. If you can get shipping for $30, that's pretty awesome.
I'm using Rodent Barn out in Montana now, which is ~$30 shipping for me. They have great rodents as well, and haven't been nearly as bad as sending extra-small smalls as LL became for a while.
I was looking at rodent barn and their prices look really good and I like that you can buy in 10-packs, but I couldnt find a shipping calculator on their website. Although I wouldn't imagine MT to CO could be too terribly bad