Attitude Indicator Cessna 172N

Hello all,

I am trying to look for a new/used attitude indicator for a Cessna 172N. I am trying to find the exact P/N that is listed on the part catalog list of my airplane. However it’s very hard to find one with the exact P/N. And the ones that I find are very expensive.

My question is: Can I install another attitude indicator that also works with vaccum but has a different P/N? Will I have problems with that during the ARC?

Thanks!