i run NGK "BCPR5EY 11" thats what was in the engine when i got it, havent had any troubles with them, my spare 1G has another brand of plugs but i cant be assed pulling them out right now.
any _efi_ fuel filter will do, theres a steel nissan one thats a good size (about size of a fist), if its for the factory filter unit that mounts to the engine block then i cant help u there, my 1G-GE doesnt have one.