A buddy of mine owned and raced a Merit 22 at one time. Email me offline (email@example.com) and I will give you his email address.
Also, I couldn''t find an M-22 website, but here is one for Merit 25''s. These folks might be able to help you with questions about the 22: http://www.well.com/user/pk/M25.html
To give credit where credit is due, I found that info on the M-25 at www.goodoldboat.com. The Good Old Boat website is chock full of useful info. It also happens to be a terrific magazine.