http://cgi.ebay.co.uk/TECUMSEH-ENGINE-AIR-FILTER-COVER-CASE_W0QQitemZ330345794042QQcmdZViewItemQQptZUK_Home_Garden_GardenPowerTools_CA?hash=item4cea24c9fa&_trksid=p3286.c0.m14&_trkparms=65%3A10%7C66%3A4%7C39%3A1%7C293%3A1%7C294%3A20
part number my friend is 35065 and its a housing rather than a cage!!!! the air filter part number is 35066.
the link above is the item on ebay.
andy.
andy marsh
July 2009