[Spridgets] Automatic transmission

[Michael Rowe]

My mechanic/tutor has a commission to put an automatic transmission in an MG TD.  This old lady has driven the car since she was 16, and wants to continue without dealing with a clutch on the many steep hills she must navigate.  Any small RWD engine with an automatic transmission will do; she does not care.  

Any thoughts on what he might actually be able to find in reasonable condition?  Where?

Michael Rowe