Ah, thanks for the tip, Bas!
Yes, I sent him a message and he was kind enough to send me simple tracings of the body and headstock, along with some basic information on the specs.
That should be enough to get started.
He didn't ask for anything in return, even though I told him my friend was willing to pay for the tracing. Nice guy!
He did ask me not to share the tracing on the interwebs, so I'll respect that.
But I'll be glad to share the experience on my building process aroud here, if anyone is interested.
BTW, anybody here got one of those?