This ad showed up in my inbox this morn. Apparently NOS Wisa's but note the 220v. I never used a WISA myself so can't confirm the pressure they deliver at the arm itself.
http://www.ebay.com/itm/WISA-air-pump-for-Eminent-Technology-Tonearm-NOS-nice-upgrade-air-bearing-220v-/271295538394?ssPageName=ADME:B:SS:CA:1120&autorefresh=true
Just sharing - no affiliation with ad.
http://www.ebay.com/itm/WISA-air-pump-for-Eminent-Technology-Tonearm-NOS-nice-upgrade-air-bearing-220v-/271295538394?ssPageName=ADME:B:SS:CA:1120&autorefresh=true
Just sharing - no affiliation with ad.