Of course you know the Alnico Blue is what came in the Andertons/Marshall cab for this amp.
If you listen to the Bonamassa clip of him playing it, that's the speaker being used.
Its going to be brighter than your creamback, but so retro.
JTM45, YJM plexi, KK800, JTM60, JTM1, JMP1, JCM1, DSL1, JVM1. Bluguitar amp1, Fender AC15.