Do you have pictures of the buck and doe? It looks like they are hairless to me. From the photo of the adult hanging over the babies, she doesn't look rex if that is their mom. Either way, double rex or hairless are fine to feed off.

Actually, in most places, you can post an ad on CL asking for an adoption fee of $5-$10. When I do have the occasional litter of hairless (not my favorite genetics to work with), I charge $10 each and they are gone before they reach six weeks. Double rex works the same way. While I don't breed them myself, a friend of mine has similar luck with his double rex.