I'm looking for a original equipment AM/FM radio for a
1975 Delta 88 Royale, radio does not have to work, any suggestions
would be appreciated

 

I have an extra one that I took a push button off of but thats not helping you a alot. I am in S.C. You should look at all the 1974-76 GM "b-body" cars in your area parts as all these should be the same.I'll bet if you just want to fill the hole you can find one easy.
I will sell my good one for 9-10 grand. It comes with real nice 75 Delta 88 rag top surrounding it. Good luck!