BTW
If it was me...
I would get both boards, and a r-t engineering IVR
RTE limiter - rte
I have to pull my cluster because my OEM ivr died and fried my temp gauge.
When the heater wire in the IVR breaks the IVR provided 12v continuous to the gauges.
You don't have much to loose trying to fix it.
I like the brass pin nail repair, just watch the heat so you don't delaminate the copper traces off the board.
You could re-engineer it. Solder wires to the board, and create an appropriate pin on the end of each wire that will connect up to the stock connector in the wiring harness.
Be sure no exposed conductors.