Looking for a set, maybe two, of leaky injectors to experiment with. 87-89

I was doing the tps reset and the volts were going crazy I opened up the tps and inside attached to the throttle body is a nipple looking thing on a plastic wheel that moves the slot on the tps my problem is my nipple is broken and not engaging the tps can I buy a new plastic peice for the inside or do I have to buy a new TB thanks

not mine.. http://orlando.craigslist.org/cto/4419801192.html

any one have one and a good passenger tail light   thanks