PV uses the 4EB2C1B pan in just about all their stuff, and looking at the circuit, I'd say that should work here too. The 9EB2C1B would also work fine.
The 4EB2C1B sells for $23-25 at www.tubesandmore.com
The 4EB2C1B sells for $23-25 at www.tubesandmore.com