Any ideas where to purchase 1 of these in Gish scale

Ozark? Trackside Details? I think both sell air pumps. But maybe not the double/compound type?

http://www.warriorrunlocoworks.com/tsairpumps.php

Thanks Pete, in the mean time I found one off a Lionel Atlantic which is probably the right vintage but for a shop built engine will do and for $3.00 couldn’t pass it up, Bill

Precision Scale Company.

Found one on eBay item# 392170340584 Precision Scale #9858 Pump, Westinghouse Cross Compound, 1/2" Scale