can I raise the fuel pressure with an aftermarket FPR while still useing the stock fuel pump?
Can you get a FPD upgrade or I've actually heard some people just get rid of theirs?

 

Yes, you can get a Rising Rate FPR and raise the rate. However, I'm not sure how far the stock pump will let you go. You'll need to verify you aren't losing pressure with a fuel pressure gauge. You'll also need a wideband to know what you are doing to your A/F ratio.

Yes, you can get an upgraded FPD:

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/fpd-not-fpd-357704/

However, it will probably be more trouble than it's worth. If the stock one will last you about 8-10 years, you'll be good to go for another 8-10 years with a stock replacement.

 

If anyone finds it useful, I have just received prices from malloy:
stock FPR - $125
stock FPD - $115