RE_fc3s_S6

hello all i took a few years away from the fun of rotary tuning and now im back 4 years later to dabble around. i have a few grand to toss into this project.
anyone can recommend were i can pic up a decnt 13b re engine> also any links would be helpfull.
What im planing is a simple swap for my 91 fc3s
i just wanna get as much resources for this project if anyone can help get me through this ill be more than greatfull. i will post pics and such of progress.
also anyone willing to build be a motor up that has a good reputaion i will do bussiness with if the price is rite. im really trying to avoid the jdm vendors to get a motor.
i just want to swap a fd motor in my fc basicly anyone can shoot me so good ideas? im looking for 400whp my budget is 6,000$ is that resonable? or what can get done good with that budget.