"The best one I can think of is Flight Safety Academy's Direct Track program"
"Minimums: ASA and TSA: No hourly requirements, just need Comm-Multi-Instrument"

Personally, I don't think people with 250-300 hours belong in the right seat of an RJ.

Another negative of FSA direct track is you could be "hired" into the program with ASA, do the program, and then ASA stops hiring. There is a guy at Jetcareers this happened to that, last I heard, has been waiting several months for a class date and still doesn't have one.