the used boat bazaar on the clc site every so often has a used wherry.  that would be a good place to start.  there is one that is posted there now.

i suspect that you could also get someone to build one for you.  if you do a google search you will find some who offer this service:

http://www.adirondackrowing.com/annopolis_wherry.htm

is an example of one who will build and appears to have a small business around it.

my only recommendation is that you see examples of the work (or the boat you are buying) before committing to buy a used one or hiring somebody. 

if you don't have experience building, you may want an experienced builder to check it out with you. 

Thanks hspira...much appreciated!  

I would be happy to discuss building options with you. You can email me at danielthaler at gmail dot com

Dan