1981-85 North American Ford Escort,a little more rounded than Omni flairs. Here is a pic:
800px-81-85_Ford_Escort.jpg
Could be a good match, you could get all four flares from one car, compared to needing two Omni's
Jim, if you want to check it out, grab this... At $29 you'd not be out much if it doesn't work out.
http://cgi.ebay.com/ebaymotors/81-82-83-84-85-Ford-Escort-Mercury-Lynx-RH-Fender-NEW_W0QQcmdZViewItemQQ_trksidZp3286Q2em20Q2el1116QQhashZitem280148321391QQitemZ280148321391QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
Connect with them first & if they have the wherewithall to cut the flare portion off they'd probably agree to do that to save shipping cost.
There are 3 more on eBay that I saw but they're new & are listed at $75 each (including shipping) & are all right hand. From the looks of them they're not symetrical so you'd probably want 2 Left & 2 right...
http://cgi.ebay.com/ebaymotors/FENDER-ford-ESCORT-81-85-primed-auto-car-82-83-84-RH_W0QQcmdZViewItemQQ_trksidZp3286Q2em20Q2el1116QQhashZitem370181888371QQitemZ370181888371QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories