I've been seeing a bunch of pictures of Overland's with trailers that can pull a regular Mini-Z. I've been searching this forum and some others, as well as eBay and Froogle, and I can't find them anywhere. Where can I get one? Or do I have to make it myself?

i think you can buy a trailer from a brand called Maisto.... Go to www.maisto.com and look for the show haulers or something like that...
here is a link to something on ebay
http://cgi.ebay.com/Car-Trailer-Tandem-Axel-1-24-Scale-Motor-Max-NIB_W0QQitemZ6986831268QQcategoryZ50285QQcmdZViewItem
in case it doesn't work just type in "car trailer" you will just have to go through all the 1:1 scales, but you will find it...
-james