Okay yes and no.... i did this. I have a base model 90 that had the door mounted belts, i put 4points in and wannted to change door panels. A buddy of mine sent me Candian Si door panels.... They are the same shape and will fit fine..... there are only two things that need to be changed..... one is not all of the tabs that pop into the doors are in the same spots.... i just drilled new holes. second is that on the top rear of the panles the Si ones are longer.
this was my old door panel:
this was the new Canadian Si door panel
see the difference??
if you have anymore questions i can post some more pics ofhte new ones on my car and what they look like.
edit: sorry for the big pics...