RMJ-Aero air-oil separator for Lycoming. Currently $224.94 at Aircraft
Spruce (part 08-00571). Almost new. Wrong one for my plane. $125.00
Contact me at http://www.abri.com/sq2000/emailpers.html

Its on eBay now:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=4639198797