FIVE RED
CCCUK Member
I've no affiliation with this seller but I bought the gear kit from them for my C5 & it was a quality product. Today Ebay sent a message saying the seller was offering a C4 kit so I thought I'd share.
Hope this is useful for someone.

Corvette 88-96 Headlight Motor Repair Kit W/ Gear+Actuator Bushings+Instructions | eBay
This is the premium quality kit that you want to rebuild your headlight motors to OE specifications or better. This is the only kit on the market anywhere that includes the bushings for the actuator linkages and headlight pivot shaft.
www.ebay.co.uk