Hi Andrew! Welcome!
Wow! Found someone that had more mice in their car than mine!
You check the headliner? I had a couple penthouse suites up there. I still have a few tenants, the glue boards let me know that.
Ah, the eternal build sheet quest.... so the places if I remember: under front seats, seat backs of front seats (the hard plastic backing), under the rug, in the springs of the rear seat lower/upper halves, behind the glovebox...I think that's it, yes?
You know, one nice thing about not having a buildsheet or fender tag is that you can make the car any way you like. You're not restricted by any codes or anything. My car is mostly stock and yes, it's my car and I can make it anything I want, but since it's so stock, I don't want to sway from factory.
Have fun with your car! Ask lots of questions! Lots of knowledgeable people here!