Hi Miller and Seasons Greetings

Have a look at Hammerschmid Precisionmodell
http://www.hammerschmid.de/kurzkupplung-spur-n.html
for a close coupling system that also has a replacement fitting (last product on page) to give a NEM socket to stock that does not have one. May fit to your KoF with a little work.

Regards
Michael

Sydney, AUS

Engineering wonders are a thing of beauty - just look at the steam engine