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WTB matched pair 6072 for Bugle 45 amp

I am needing a pair of 6072 tubes for a Bugle 45 amp I am building. If you have a pair or can refer me to a good source I would appreciate it very much. Believe it or not I have looked to my usual sources and have come up empty handed on this tube. I have one Beckman labeled 6072a and would love to find a second.