Chuck,
I believe kits for the Reid Engines are still available from here:
Burns & Horner Engine Co. 1974 Pearl Ave. Warren, Michigan 48091. 586-443-9047
Casting kits, Reid 1/4 & 1/8 scale model oil field engines
They did have Bessemer Kits also. I have not machined any of their castings so I do not know anything about the quality of them.
John Burns used to own this company and his castings were very good quality.
If you would like their Email Address PM me.
Lonnie