I can't think of a power tube that is/was intentionally designed to break up early. Along the lines of Isaac's post, generally the goal in the tube game is to extract maximum power while keeping THD as low as possible.
I think that's particularly true in the realm of the big power tubes like the 6550 and KT88.
They'll all distort if you turn up enough, and from what little I know about the artists you mentioned I'm guessing they just crank 'em up.
That said some tubes break up earlier than others, and I second the idea of contacting Eurotubes. If anybody can help you in your quest it would be them.