I just came here to tell you that there are some Tommasini air forks on ebay that you could potentially shorten to 650 but it looks like they're sold already.
http://www.ebay.co.uk/itm/Tommasini-AIR-Fork-700C-Track-Pista-No-Brake-Hole-/131754312786?_trksid=p2047675.l2557&ssPageName=STRK%3AMEBIDX%3AIT&nma=true&si=1aK8jZcNEujNcNtfST4gJBKwba8%253D&orig_cvip=true&rt=nc
@Trunkie started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
I just came here to tell you that there are some Tommasini air forks on ebay that you could potentially shorten to 650 but it looks like they're sold already.
http://www.ebay.co.uk/itm/Tommasini-AIR-Fork-700C-Track-Pista-No-Brake-Hole-/131754312786?_trksid=p2047675.l2557&ssPageName=STRK%3AMEBIDX%3AIT&nma=true&si=1aK8jZcNEujNcNtfST4gJBKwba8%253D&orig_cvip=true&rt=nc