I take it that you're asking here because you've already asked Rob for one and they're out of them at Empeg? As I recall, they weren't charging too much for a spare sled.
Failing that, ask Rob or Hugo where they sourced the Mark 1 connector. The connector's pinouts are documented at the developer site. Of course, the machining of the metal frame would be something that requires a certain set of resources... but you seemed to indicate that those resources at your disposal should you need them. Metal shop class, perhaps?
Tony FabrisEmpeg #144