Need upgrades for my MSP

Hey guys... I got a 2003 MSP and I’m looking for a new standalone ecu to start tuning. Problem is... I can’t find one. I don’t want to have to get a new ecu and have to pay to get it remapped for my engine. I’m still running stock engine but with fmic and blow off valve. Any suggestions?
There are various standalone systems available. Haltech, AEM EMS, proEFI. These are complete ECUs that require merging or a new engine harness to be made. I think what you’re looking for is a piggyback. Especially with those mods, a standalone is a bit overkill. Unless of course, you plan on going full drag/race car/weekend warrior.

People generally start with the Apexi SAFC or SAFC-II. They will get the job done for what you need. Hope it helps.