From what I've been told the B28 can has been discontinued for some time. You will have to call around with the numbers supplied in this post to try to find one in stock somewhere.
69 Z/28 Dover White X33,ZL2,PS,M20,Std.int.04C
67 SS/RS Mt. Green 1W,2LGSR,3SL,4K,5BY,07C
70 Nova L78 Blk. Cherry,Sandalwood,M21,02B