Need help finding new temperature gauge

I need to replace the temperature gauge in my 71 Scamp. I've replaced the voltage limiter with a solid state equivalent, and both my gas gauge and temperature gauge are not functioning. I think the sending unit on the gas tank is bad, but I know the temperature sending unit is good.

For now, I'd like to replace the temperature gauge and looking at what Classic Industries has, I see a couple of possibilities:

http://www.classicindustries.com/mopar/a-body-scamp/parts/?q=MA1545

http://www.classicindustries.com/mopar/a-body-scamp/parts/?q=MA1547

MA1545 looks to have the same print pattern as my original gauge.

MA1547 is listed as the correct gauge for my year, and has a completely different footprint than MA1545.

Without taking apart my dash again (it's my driver), can anyone help identify which gauge will fit my 71? I'd like to keep the appearance original, which I why I'm looking at MA1545. A known-good working used gauge would be fine if someone has a line on one.

Thanks,

John