I tend to think that every steam locomotive or diesel has been modeled at least once and that unless a new prototype in the real world comes along, well, most of what is available is either a reissue or a variation coming from, again the real world. Today, I was thinking about the prototypes that fall between the cracks, that where either in production and cancelled, like the B&O Besler Type ( like the toy producers are apt to do) or planned and never made it into production. The small B-B diesel-electric resembling a pocket sized GG1 the PRR planned for Baltimore or the UP Steamotives...some of these look way cool. While not strictly prototypical, they would look good on a layout. Any other examples? The Besler looks to me like a cross between a J type and the PRR S1..with a lot of chrome. Very appealing to imagine as a model. Wheres the ACE model I have been waiting for?