check ebay

Colin:

http://www.CorvetteCentral.com stocks a small selection, some are
discontinued and out of stock, check for availability. Prices are
probably in the same general area as the dealers ($200+ per wheel)
Check the 'Vette dismantlers, places like:
http://www.Vette2Vette.com
http://www.carolsauto.com/
http://www.corvettesalvage.com/

Here's a great site that's got lots of 'Vette links:
http://www.idavette.net/parts.htm

Also, post a parts wanted message on the Corvette Forum:
http://forums.corvetteforum.com/forumdisplay.php?f=55

All kidding aside, the LPTWS wheel sensors can and do break and become
detached inside the tire causing potentially catastrophic damage.
They have been known to self destruct at high speed and cause massive
tire/wheel imbalance leading to tire failure. At speed, a sudden wheel
imbalance and/or tire shredding can be fatal.
Removing the sensors causes the LPTWS light to light on the DIC, but the
bulb can be removed quite easily.
It's a nifty feature to be sure, but if you do any sport driving at all,
I highly recommend that you consider removal of the sensors completely.

Good luck!

TomC
'90ZR1 #792