Hi Wormy.
Trying to find information on relatively obscure guitar brands can be frustrating. I can't help you specifically with Westbury but many members both here and on the
http://forum.westoneguitars.net/ Forum have them and can give you some intelligent information. (The Search function is your friend).
What I
can do is correct the impression you have been given that the Matsumoku plant "burned down". I've seen this reported on many sites and it's a myth, simply not true. They went out of business about February of 1987 when the principal owner Singer, ceased funding the operations.
For a timeline of the Westone instruments (the Mats house brand) have a look here:
http://www.westoneguitars.net/history-1/