Hi,
The Rapidayton pumps were made in Dayton Ohio by the Dayton Pump & Mfg. Co. I would suggest that you attend the "Ohio Gas 2001" petroleum show that is held in Dayton Ohio in May. Since the pumps were made in this area there are still several around.
The show is May 4 from 4-7 and May 5 from 8-3. It is held in conjunction with the "International Antique Advertising & Coin-Op Show". There are over 500 spaces between the two shows. $4.00 gets you into both shows! There were 317 spaces sold at the "Ohio Gas 2000" show so there are lots of pump parts and goodies!
The website is
www.oldgas.com/ohiogas/ See you there!