I found this Hammond B3 clone with a tube amplifier. If you play blues and have a keyboard player then he needs a B3. They also have a guitar amp. NATIVE INSTRUMENTS: B4 II
I cleaned up my tab for Sonny Boy's Help Me and made it into a short book. There's a Kindle version for 99 cents, and if you buy the paperback you get the Kindle free.
Playing "Help-Me" In the Style of Sonny Boy Williamson II: A step by step, note for note analysis of some of Sonny Boy's Signature Riffs