Someone I know is looking for one. I assume it's not repro'd. I have no idea what the part # is or what years &/or other models are the same but if you have any relevant info with respect to that, please post below and I'll send him a link to this thread. If you have one, PM me and I'll send you his contact info. Thx.
You might try these guys if he still has the original ... gr. 3.107 pt 6427509 https://tristarrradiator.com/ https://www.clocksandgauges.com/gas-tank-sending-unit-repair.html
I've bought several of these...they work great https://www.ebay.com/itm/3031299043...:Buick&hash=item4693f34502:g:PL4AAOSwF25a~vFS