I bought a Terry Carbine a few month ago... This started an exhaustive search for magazines and spares. I had rough time finding much useful information. After a ton of work, I struck gold!! The man who bought all the stock and equipment from the Wilkinson estate is in business and has just about anything you need. Thought I would post this to make life easier for anyone who is looking:
Northwest Arms LLC
9006 Whipple Rd
Pasco, WA 99301
Attn: John Weyand
<armsnw@msn.com>
Phone 208-722-6771
He is a little hard to get a hold of, but he is a GREAT GUY:), and will treat you better than right! Tell him Terry from Brunswick sent you and enjoy you Wilkinson - they are a blast to shoot!