Rochester 1 barrel carb help

[65btk]

Start off by saying I've been a long time lurker on the site while I slowly buils my 65 c10. I have been doing a budget build on it and refreshed and painted the Inline 6 230. Well I went to rebuild the 1 barrel rochester type b carburator and broke the power piston tube. I have looked around and can find my exact one any were. https://www.carburetor-parts.com/Roc...n-_p_3654.html . Tryed that website and they do not sale used parts no more. Can some point me in the right direction on where I can get this part?