Any Explorer 302 will have an adapter to use for emergency use. Some have the oil cooler in them, but the others have the same size housing and mounting. The difference is that without the internal cooler, there is one radiator hose there instead of two.
To find the adapter which includes the cooler, check with local salvage yards, a pick and pull if you have it, eBay, or the venders here who sell parts. I'd ask Karl first, he's a great parts source here, linked on the front page of the site, at the bottom.
Kbabiak Used Explorer Parts;
http://www.explorerforum.com/forums/member.php?u=44601, or
http://www.explorerforum.com/forums/showthread.php?t=213257&page=4