I believe the Gulbransen Co. had the policy of making their stacks so
that they were practically un-rebuildable.  Their intention was to have
the old stack removed and discarded and replaced with an entirely new
stack which they would have been able to provide except that they
ceased their operation and no new stacks were available.

Some years ago, there was a fellow that I think was in Indiana who
claimed that he could/would rebuild Gulbransen stacks.  I believe he
advertised in the Antique Trader Paper then.

Otherwise, Rotsa ruck!

Hal Davis