Sometime this year Zoukeimura will release the third edition of their "Super Rail Series" in the form of a plastic model of the EF13 "crocodile" style outline DC locomotive. This type was a wartime design, and first was based out of the Kozu locomotive depot in Kanagawa Pref, hauling freight trains on the Tokaido Line. Later the type was shifted to other depots on the DC network. In the mid-fifties these units were rebuilt with the more conventional box cowling most associate with mid-century JNR DC locomotives.
Pricing is 39,900 yen (quite reasonable) for all three types (a wartime era model and two postwar types). Unable to find a good pic of a painted production model, here is the best I could find:
http://www.zoukeimura.co.jp/cp-bin/blog_srs/pic/Img19385.jpg
prototype pictures:
http://rail.hobidas.com/blog/natori09/archives/2009/12/post-1167.html