Summary

I tried the original files by DannyTheElfman and found them to fine for my printer, so a little work in Thingiverse and this is the result.
I've added a chassis mod, thickened the sides and tops and added the roof to the body forming 1 piece.

A Kato 11-109 chassis clips in and the unit looks good when running.

The photo shows the first prototype before the tops were altered.