Hi...as I'm preparing to pull my 300D's cylinder head, I'm having trouble finding a new cam to instal as opposed to using the old one...are these available anywhere? If not available, then who regrinds old cams and what is the cost? Also, when removing and reinstalling the cam supports and adding new bushings, do people just pop in the cam or send the cam and head, with supports, to a shop to have them align bored and polished? Do rockers need any special treatment before being reused? Appreciate any input from other members...many thanks!