I just went to a local place that makes SS towers/things for boats. Took my 3/4" alum bows in (three piece ones) and they are fabricating exact replacements out of 1" SS for about $80 each. Bought new Bimini "skins" from Defender on sale to replace my Taylor bimini top. I actually got two of them because at the time, they were only $35 each. An exact fit.
About 94" wide X 96" long for the TomCat.
Charlie