Ryan where are you ? Will you ever finish the development of RFX? The hardware has caught up and it needs to be finished. Are you still with Knife-edge?
RF-X is a discontinued product but you can generally find it on ebay. But you need a strong system to run it so you might post your system specs so we can give you some info on it if needed. Personally I'd make sure you have an NVIDIA GTX1080 or more to sure you have enough graphics power to run it. And then there's been reports that the newest NVIDIA cards, the RTX30 series won't run it properly with some texture problems. So you need to make sure you can run it before buying it. Also what graphics resolution do you plan to run it at?How do you get in on RF X?