I wish you the best. But, do remember that you are looking for car that is at least 36 years old and may be as old as 40 years.  Pinto's in general were not considered a collector car where they were set aside and preserved (like say a Buick Grand National).  Most suffered from lack of proper care. Smog equipment failing and being obscure only adds to the problem. Factoring in that you are looking for a specialized version and the difficulty only increases.

In 2007 when I first bought my Pinto wagon I was in a junk yard and came across a cruise wagon. Thinking the panels might be of interest, I considered them. I was traveling at the time and just figured I'd get another set when more convenient. I've made at least 100 wrecking yard trips since then - and never came across another one. You may have to consider buying a less than desirable Cruise Wagon and then paying someone to restore the car with the amount you are will to pay for a decent one.  Regardless I wish you the best.

Are you using other sources in your search? There may be commercial sellers out there that no one on this site may be aware is selling a Cruise Wagon.

Have you seen this car? Hey, it is 37 years old, but at $2,500 it doesn't look too bad.  http://orangecounty.craigslist.org/cto/5584905880.html

There was a guy in Prosser, WA that had 79-80, V8, air, power everything, wanted 10K.  Beautiful car.  Might still be on the site.