Supertee, sorry for the delay in getting back to you.
I just pulled out my set of bearings for the S10. I'm not sure how to measure the tapered upper and lower bearings in a way that would give you the info you need to source an alternate bearing from SKS. If there are specific measurements you need, I'll be happy to take them. I can provide the identifying info from the races and bearings themselves; if you have that, you may be able to cross reference them to an equivalent bearing in the SKS line.
Part Number 93332-00078, which is the upper steering head bearing and race, are both made by Koyo, and bear the following identifying info:
The bearing is marked "KOYO", "HI-CAP", "320/28JR", "JAPAN"
The bearing seal is marked "KOYO", "320/28JRR9", "17"
The race is marked "KOYO", "HI-CAP", "320/28JR", "JAPAN"
Part Number 93332-00081, which is the lower steering head bearing and race, are both made by NTN, and bear the following identifying info:
The bearing is marked "NTN", "4T-CR-0643L", "JAPAN YN"
The seal is marked "NTN", "CR-0643L"
The race is marked "NTN", "4T-CR-0643", "JAPAN", "YN"
Hope this info helps.