Tiernan Roe, of West Cork, has built this 22 foot lapstrake cuddy cabin runabout. It's got a 30 hp Honda in a well - very economical. Looks like it runs at about 20, and has the right hull shape for a Bantry Bay (or Penobscot Bay) chop.
Here's his blog - with lots of pictures of the boat in process, and links to his furniture making and other things. 19,900 Euro and it's yours (w/o power).