Best preamp for Pass Aleph 0 ???

Apart of the Pass Aleph P preamp and other Pass preamplifiers, does someone have found a good preamplifier, that works really great with Pass Aleph amplifiers ?

I know it's hard to make a preamp work fine with Alephs, and that people usually say : "what works fine with a Pass is another Pass"...

But I'd like to make them work with a tube preamp, so if ever someone has an idea.....

Thanxs,
Steve