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Horse Trailer World
http://www.horsetrailerworld.com/home/newhome.asp
is an excellent reference site! I don't know if they have a review specific to the Explorer but do have one on 'SUVs and...

The marine blue/green and the turquoise both showed availability in mid April. Maybe a bug in the ear of your favorite tack shop would have them for you then. They've really done a good job with...

The marine blue and mint green is really pretty too!
http://www.pikeur.de/eska_uk/images/500696977c1394c11.jpg
Thanks for the site, I couldn't find it myself : )