I just found a Whiteside replacement for the 17/32" 7 degree dovetail bit at http://www.hartvilletool.com . It is item RD7531. The salesman called Whiteside while I was waiting and they said they are not yet making the 11/32 straight bit, but with more requests they would. Hartsville has a 15% off sale on router bits this month. The 17/32" is $15.29. Woodcraft also carries them for $21.99 and a two bit set (dovetail and straight) for 34.98.
Whiteside #146433 is the 17/32".