Just ordered two sets of the slicks $9.90 each and two of the regular whitewalls $12.90 each from modelroundup.
The only whitewall slicks I ever had as a kid in the 80's came with the Li'l Coffin kit and I always wanted more. Now that I'll have them the slicks will be going on my deuce rat rods I'm working on. The only problem will be finding wheelbacks for them.
Just in case anyone else felt this way, the idea of "parts packs" seemed so exciting when I was a kid! Man did I ever want those things!