Sorry to hear about your loss. I'm sure you put LOTS of hours and money into making that splitter. I know how much work it was to help my father build a log splitter, people don't think about all the costs involved, welding, steel, electricity, cutting, fitting, testing, etc... All that, and then this FU*KING scum bag takes it from you. I just don't understand it sometimes... It really makes you wonder.
Like most have suggested, check out craigslist or, better yet, check out
http://www.crazedlist.org/ (you have to use firefox) but it will let you search for anything on all the craigslist sites that you select, that way you can search your whole area. Also, I don't know how much time you have to looking for your splitter, but you might want to see if some of your neighbors have security cameras, maybe SOMETHING caught someone. I find it hard to believe that nobody saw anything. Call your local news station and tell them about it, they might run a story. Hit up any place (like others have mentioned) that might run into someone trying to off load a splitter cheaply. I'm sure that the dic head that did this just needs to quick cash for meth or something...
...and when you do find 'em, maybe you can test out the crushing force that splitter of yours makes... :censored:
M.