B5m
How much are you willing to spend? I have one that is in really good shape, that has been run with a chassis protector. It literally has everything to lighten the beast (titanium screws, ball studs, lunsford turnbuckles and axles, pucks, cut gears, aluminum everything). I am currently running RM, so while I am not looking to actively sell, I will let it go for someone that is not necessarily to get one at a "I'm dumping" price.
Just let me know what you're willing to pay, and if you want pics I can text them.