Dunno about the CRX parts, but the 88-89/90-91 fender thing is at least partially incorrect.

Yes, they switched from the side screw style to a slide-in tab thingy, but the fender itself is still the same. The body line is the same and the holes are all the same. If you have an 89 Civic and you have the corner light along with the screws and the plastic things that the screws go into, you can swap all of those over to a 90-91 fender. At least, you can on the sedan.

I know this because I swapped one. Direct swap.

 

i bought a 90 front bumper 90 driver side headlight and the rest i got is 91 so will that fit in my 91 si? all of this is from a hatch