Where to get Powermaster Brake motor?

[2QUIK6]

Where is the best place to get a Power master motor from now days?
I see that Hank Terry sold his business to a retailer, and now that retailer appearently does not sell them anymore, Unisteer Performance.
I remember reading a long time ago that Autozone sold them, even with a lifetime guarantee at one point, is that a viable option?
I also see them at nos4gn, anyone recommend those for the price at $319?

This is for a friends car who wants to keep it original so converting to vac brakes isn't an option for him.

 

[EB1STGN]

http://www.turbobuick.com/forums/brakes-suspensions-tires-wheels/282273-f-s-powermaster-motors.html

check these out.

 

[ASturbo86]

Has anyone purchased a PM motor from Transmission Specialties on eBay? Mine is bad and am looking for the best price and most reliable seller.