You can get most
Dimarzio pickups in red, so that's not a problem. You might also watch eBay for a set of the factory red Ibanez/Dimarzio pickups for that guitar. They turn up periodically when someone with an original 770DX decides to "upgrade".
There are several pickguard manufacturers on the internet (and probably a couple in this forum) who could make the pickguard for you.
As for the knobs, that's a tough one. There's been some NOS factory knobs on eBay lately, but none in red.