Wow, thanks for actually filling out your profile... well, the automotive details anyway... You should include that info in the actual post too or add it to your signature. (Might add the city and state, more likely to find someone willing to help you locally if needed.
)
For the 7M-GE Toyota part numbers are:
Oil filter - 90915-YZZD1
Fuel Filter - 23300-49155 (This I would buy specifically from Toyota.)
Spark Plug - 90919-01121-83 (This is the NGK BCPR5EGP; Regular platinum with a .044" gap. Due to differences in sizing standards I recommend sticking with NGK's plugs, whatever model/type you use.)
Any decent parts store
should be able to cross reference the part numbers.
Please post MKIII specific threads in the MKIII section. I think you may get better response and other may be more likely to find your info when they search for something.