Neutral Safety Switch

My '72 Eldorado has a Neutral Safety Switch inside, at the base of the steering column. Mine went on me, so I hot-wire the car to start.

The few switches I came across the internet cost an arm and a leg.
I wonder if you out there know where I can find one for under $75.

(This switch is the same for Caddies between '69 and '72, I think, and attaches to 6 wires, with vacuum tubes on its back.)

Can someone help me out? Can I use another car's switch?

Try Napa? Usaparts.com, 40 year old classic car, 75.00 is too expensive. !?

Thanks maxwedge, I took your advice.
I removed the switch and rebuilt it myself.