seabass -
The most knowledgeable collector of Wilson Bros. bows of which I know lives in Ohio. He posts on the WidowWall under the userid of "widowman". I think that he has a couple of postings on the July classifieds thread there, so you should be able to find his contact information. He may be able to put you in contact with someone who would be interested in your LH bow.
I also collect Wilson Bros. bows, but shoot right-handed, so rarely seek a LH bow. I do have to say that I tried to trade a 57# H-325 for a lighter (50#) one (H-325 or comparable model) thru the classifieds and, much to my surprise, received only one nibble. I have also seen very few postings regarding collecting these vintage bows.
Ray