Do you have any other photos of these machines? I know they are both Taig headstocks, ways and chucks, but the motor and mounts have me baffled. They could be the same or a variation of the universal sewing machine motor I mentioned in the first post.
Unless you are set on building like machines I could come up with a cheaper solutions. A Taig headstock is $65, the bed/ways. about $70, the chuck is $72. Motor as shown now is an unknown, the speed controller about $20. Machining the fittings etc., cost is an unknown. Known is about $225. Unknown costs is a guess of another$50 to $100.