Yeah, You won't find those sets of size anywhere. I am running 22s and wanted to get a little more sidewall measurements in the rear from 25 to 30, but I couldn't find them myself. I had to go with 335/25/22 and 295/30/22.
This is where I got mine from;
http://www.ebay.com/itm/2x-Lexani-LX...ZY9myh&vxp=mtr