Thank you thank you woodster and Stu Jackson for your replies
Woodster I googled Springfield table supports but did not find anything that would work for me. My poll diameter is 3½" so I will be doing more searches to see if I can find one.
Stu Jackson I appreciate you posting the link for me, I wish it was that easy. My intentions are to interchange the tables at will. So I can use either one whenever I want too. Stowing the small table most of the time, and just use it during cocktail hour or casual seating. We do cook and eat on board when were not eating outside the large table works quite well. But there are times when it would be easier to use the seating in the dinette area with a smaller table. I may look into having a custom base made, my buddy down the street can weld anything aluminum, stainless steel, he is a welder by trade doing aerospace welding. So a trip to the metal supply house might be in order for me to see what material I can find that will work. I was hoping that these were still made and someone might know where to get one, I'll keep searching but I'm also going to entertain the thought of making my own. Since I'm going to have to fabricate a bracket for my winless in my locker anchor I might as well kill 2 birds with one stone. Thanks again for the link interesting read.
Kim