Sending unit

I stumbled onto a site a few weeks ago that supposedly can rebuild your sender. Cannot remember what it was but you may be able do do a search and find them. If I see it again, will try to remember to post it .
Yote

Edit: A quick search gave me these:
1. Bob’s Speedometer
2. Instrument Services
3. Tri Starr Radiator
I don’t know anything about them but hope it can help you.