Congrats on your purchase! She is beautiful!
To find parts, go to the main Four Winns web site and click the customer service link at the top. Then to the right is a link for parts catalog. I was guessing that your boat was a 2005. For that year, it doesn't look like it required the short table leg. It was just a hard plank??
http://parts.fwdealer.com/Catalog/Categ ... 8V-D05-Z00 The plank is part #100-522733 and it is under cockpit hardware. There are pictures listed for most parts too. My boat is a 2006 and there is a shorter table leg for that. I think it was a 14" leg. I don't have it for mine and FW wanted a lot more money. I checked on Ebay and found it one time for far less money, but did not pull the trigger in time.
Anyway, once you have the part number for what you are looking for, find your local FW dealer and they can order it for you if nothing else.