I know there are cranks available but long cage rear derailleurs and shifters for a triple are gone. Shimano makes Tiagra, SRAM and Campagnolo have abandoned it. Plus Shimano front derailleurs seem to work best with a 53T big ring. Their MTB fronts are not compatible with road shifters. I am not interested in barcons for this build. Sadly I seem to be SOL.
Do a Search on EBAY for what you Need.
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Fred "The Real Fred"