The MAFS needs to be the one that ends in N62, i dont know where the other one is from. Maybe a Z31. I got mine directly from a z32.
As for fuel pumps, just get a walbro, brand new is ~90-100, you cant beat that. Is this for a s13 or S14? If it is for a S14 there is only one place that i know of that sell the correct kit for the S14 fuel pump,
http://ftfmotorsports.com/1924255lphhi.html , Thats the place. It's a little pricey, but you wont starve the motor if you are near empty.(info from FA faqs)