Here is a thread on what I did to my 84 dash:
I'm not sure what "panel" you're talking about got pics of the dash?
I agree with West Marine for Rub Rail the rubber insert is inexpensive and easy to install (just add boiling water) the shipping on the Aluminum rail killed me.
Steering wheels can be orderd through almost any auto parts store I used Car Quest and they had a near original one for under $50.00
Side windshield glass might be tough to come by I'm assuming you have the little spider web cracks in the plastic? Mine were also alittle hazey and polished them with meguires plastic polish and a buffer and they turned out pretty well. Might be able to get a local glass shop to cut new plastic??
Boat looks super clean congratulations. Travis