Roll your own rollerskis

I would like to try rollerskiing, but absolutely cannot handle the
off-the-shelf ones. For various reasons, I need ones a couple of
metres long, with ratchet wheels on the front and a REAR braking
system operated by moving my calves. There doesn't seem to be
any easy way of getting components (affordably) to build my own.
I would probably use wood for the bearing member, or possibly
aluminium section - very light weight and elegance aren't needed.

Has anyone done this, or got any useful information?


Regards,
Nick Maclaren.