Ok well, bosch pumps can be found anywhere, repco, bursons etc. Try Kudos Motorsports on here he has them pretty cheap.
Modifications with Walbro I mean engine mods, I hear they shit themselves easily. The bosch pumps are best by what I hear.
You can get your car tuned with stock ecu by doing a re-map on it. SAFC is a fuel cut defender. Why do you want an SAFC? Are you getting fuel cut issues with your car?
Hope this answers some of your questions.