ADA STD-1 transformer -- which one (power, dimensions, brand) for 110V

[elliotfreedman]

Folks,
I've got an ADA STD-1 that I love, but need to finally transform it from 220V to 110V.
What brand/dimensions/power transformer is in the 110V version--and where might I source it or an alternative?  Hammond doesn't seem to have a 110V/24VAC transformer that is small enough.  The original 220V transformer has no markings.  Any ideas?
Elliot

[MarshallJMP]

I just did some measurements and mine ( a 220V model) is consuming around 12VA (10W) and the voltage is 18Vac CT 18Vac.