Does anyone make good repo tanks

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I am trying to find a pair of tanks for a knuckle 41 thru 46, I ve even thought of cutting up a pair of flathead tank and grafting on the bottoms of panhead tanks, which I quickly dismissed cause flat head tanks are almost as rare as knuckles.
Anyhow in the interm is there any repos that are decent or are v-twin my only option
Thanks FNA