It is
easily done with toner transfer...Have you ever tried?
You mean something like:
http://www.instructables.com/id/Toner-transfer-no-soak-high-quality-double-…
?
No, I have not. I'll keep it in mind -- thanks for the suggestion!
If, like most extender boards, you just need a bunch of parallel
traces, you could probably whip something out very quickly with a
table saw.
--
Will