Check the following:
http://www.leevalley.com/wood/page.a...936,42958&ap=1
http://www.leevalley.com/wood/page.a...936,42958&ap=1

Or you may get some idea and make your own.

"Bernie Cook" wrote in message
...
Hello group ,
I have a friend of mine that does a lot of boat repair and canvas
work on them as well .He is getting into boat building as well and he is
looking for a type of adjustable curve or batten for laying out long
curves and being able to put on the wood to transfer it .I have read of
these items but have no found what we are looking for .Any help on where
to look would be appreciated .
Either email me or post .
Thank you ,
Bernie