Rally dash oil pressure gauge issue.

So as you know I was at it last night after work. I did have wires switched in the round connector at the dash which explains the "pulsing brake light".
At the same time I did not have pulsing voltage at the oil sender wire under the hood. I found a wiring diagram from a 69 Barracuda which straightened the round connector out. I still have some issues to work out, like the fuel gauge and the high beam and brake light etc. I want to find out all that doesn't work and go from there. I am convinced my oil pressure gauge is gooched, and that is probably from installing the non rally dash idiot light sender in stead of the rally dash oil gauge sender previously. right now, my temp gauge and amp gauge work so that is a plus. I just wanted to post this current situation explanation for folks to learn, I do think the main reason the oil gauge is toast is because of installation the wrong sender. Now I am wondering does anyone know of a way to repair it or someone to send it out to? Or someone who may have a used oil pressure gauge for these dashes? I am torn between getting an autometer oil gauge or that gauge upgrade from Herbs parts,but would probably just like to have the original style dash and gauges. There isnt much on these by way of internet search. there is alot more B and E body dash stuff.