newbie looking for WIW steering wheel 78?

There's usually a couple of them on eBay at any one time. They are not particualrly rare and were available on several different Ford cars and trucks in that period (Bronco, Granada, F150, etc.)

Here is a black one probably from a Bronco or F150:
http://cgi.ebay.com/ebaymotors/1978...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

And here is a medium condition one for a MII:
http://cgi.ebay.com/ebaymotors/Must...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

Here's one from a later Mustang missing the center cap:
http://cgi.ebay.com/ebaymotors/MUST...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

This one is not in such good condition, the spokes have been painted, and its kind of pricey:
http://cgi.ebay.com/ebaymotors/MUST...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

This center cap may be a repro:
http://cgi.ebay.com/ebaymotors/79-8...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

I would say $80-100 is a fair price for one in great condition.