We found 3 Reddit comments about Spycraft Roleplaying Game Version 2.0. Here are the top ones, ranked by their Reddit score.
I would say don't use Pathfinder or Starfinder. Instead, you're going for a 90s feel and a Bright kind of thing, find a D&D 3rd or 3.5 book, or just use the open source SRD material for it for the races, and then pick up the Spycraft d20 game.
Spycraft was set in that 90s/00s timeframe, so all the technology will be compatible. Just use the D&D races as a base, and then use the classes and tech from Spycraft. You can mix in magic items from D&D/Pathfinder if you want I guess.
Have you looked into Spycraft?
A rather complicated version of 3.x D20 with rules for just about anything. Very similar to this, but a bit more cleaned up. A used hardcopy is pretty cheap.