Thanks to Tom Troncalli:

My 38 needed a new starter solenoid but Universal only sells complete
starters for something like $800!

Being basically a tightwad, I hunted around and with the help of an
ambitious kid at Advance Auto Parts, I found that the exact same solenoid
is also used on at least one Japanese car.

I highly recommend everyone to keep this information:

Advance Auto Parts.
Part # 28-5009
GP Sorenson brand
Sku# 39994090

I think I paid less than $30 for the new solenoid. I compared the new
solenoid with the old and it's an exact identical match with even the exact
same machine and casting marks.

This information can save you hundreds of dollars.