spotted on ebay, 'dead' trident/sprint but might be useful for anyone looking to do a castwheel/fork conversion...
http://www.ebay.co.uk/itm/230821255524? ... 1423.l2649 (http://www.ebay.co.uk/itm/230821255524?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649)