Chris,
First of all, I am truly sorry that you have had to go through such an experience, anyone of us new to narrow boats and the dream that is hoped for by having our own boat can easily be deceived by people that have got away with criminal activity for many years.
We are all wary of Double Glazing salesmen, People that can fix a roof or Tarmac a driveway, I guess we don't expect it from the canal boat builders!
Given the amount of "builders" that go out of business and then re-appear using another name, it is clear that they are immune to the heartache, pain and absolute devastation that they cause through their actions, on decent people.
It's about time that Forums (where prospective buyers will naturally go for advice) got their act together and thought of a way to help people, before they (the decent people looking to get onto the waterways) get themselves into situations that end up causing untold damage.
We have heard it many times before why the forum "Can't get involved, because it may bring a Lawsuit", That's ok, Let's do something constructive...
Why not have a thread/page/forum for "recommended boat builders, suppliers", decent people that can provide a decent SERVICE" ?
There are many people on here that can give good, honest constructive advice, let them be heard and I'm sure that the unscrupulous merchants won't last 5 minutes if they appear on this forum!
Over to you all now, I can't wait to see how newbies to the waterways might get some help from the experienced members of this excellent Forum.