[D-CEL]

Colin,
It would be rare for the corner parts store to carry a Wilwood pad, but you might get lucky if they have a local stock car track or they have been requested to stock them. However you can get them from Summit and Jegs at a good price.
For cross reference, the Wilwood pad type #s are:

7112 for the 4 piston Dynalite with cotter pins
7420 for the 4 piston Superlite

I recommend the "E" OR "BP-20" compounds:
for the Dynalite
"BP-20" padset part# is 150-9413K
"E" padset part# is 15E-6096K
for the Superlite
"BP-20" padset part# is 150-9416K
"E" padset part# is 15E-6084K

I hope this helps
Jason