Filament transformer for 3" Pilot?

[Eric H]

Hey gang, I want to put a 6.3v transformer in my Pilot TV to save the CRT from the start up surge.

I have one already but it's about 2" X 2.25" and is just too big to easily fit inside the cabinet.

Does anyone know of a specific transformer that would be small enough to fit, preferably under the chassis?

It's only going to power the CRT so it doesn't have to have much amperage. Whats a 3KP4 draw anyway, .250 ma?)