After consulting my photo archive and reviewing all the posts I made during the timeframe (June 2014), I've concluded that my post with the MPC box clones has vanished, as well as the photos...and the link to the post that used to be in my signature 
But for the sake of completeness, here are some of the photos from that thread, of some the MPC-style boxes I crafted. Captions reference the photo above them:
I acquired a number of postwar items in an estate sale. Needing boxes for them, I found an old template for an MPC auto carrier and set about defining the key dimensions that could be modified to produce templates for boxes sized for a variety of traditional-sized rolling stock. Above is a cut out template for a 6457 caboose made from a single sheet of poster board, before folding.
The completed box with a clear acetate window added.
I made a minor error in the dimensions of the first version of the 6457 box, but found the result was the right size for a Beep. I wouldn't use these boxes for anything heavier than this unit, and even then I doubled up on the cardstock thickness on the bottom, top and back.
The poster board came from Staples. I've since found a thicker version called "railroad board" from an art supply retailer.
Completed "Beep" box with window. This unit is a Taylor-Made Trucks product that pre-dates the RMT Beep. Since the chassis and shell were sold separately, neither original box fit the assembled unit. This one now has a "home".
Double-stack box made for traditional-sized gondolas during test fitting prior to window insertion and hot-glue.
Completed gondola box. The top gondola is a Kusan unit.
As mentioned before, these boxes are really just for lightweight traditional rolling stock. I wouldn't use them for locomotives--for those I went with the same BCW card boxes mentioned in earlier posts. If anyone would like the template I crafted, I can provide a link to the full-size image--uploading it to the Forum shrinks it to a size that makes it difficult to read.
---PCJ
