Go to Aluminum 2000 at 717-569-2300. See it at aluminum 2000.com/wprts.html or e-mail info@aluminum 2000.com. I found the latch for my 36 Convertible there. Must be Tiara's source. They are at PO Box 1200, Charlestown, NH 03603. You need part # 40-2106 Sliding Window Latch 4400 Series. Should not be more than a couple of hundred dollars. Its for a boat. Just Kidding. Capt. George