dual belt pulley - who's got 'em for a P2 or NAD53

Anybody have an 'extra' or know where to get them?
I should have been more clear.

I need the pulley so I can use two belts simultaneously.

33 1/3 and 33 1/3
I didn't know they were commercially available, but I know a guy who made one and said it made a big improvement to the speed stability.
Do you think you can get me in touch with him to see if he will make me one? ...=> omaille@comcast.net
Hey I'm interested too. I think the upper price rega units (P5,P7,P9) motors all come with them. Correct me if I am wrong Regamaniacs. That would be a sweet upgrade!
I have a P7 and can confirm it has a dual belt pulley on the motor.
p7 and p9 have, p5 is single