Replacement Gallien Krueger transformer (240v to replace 110v)

[dangerboy]

I have an old Gallien Krueger 250ML (guitar combo) but it's annoyingly 110V so it needs a big transformer to plug into in the UK. 

So I thought, why not have a look inside and see what I can do? I don't really care about it but fixing it seems fun.

 

It has a big chassis transformer mounted inside. This is labelled "00617 MAGCOMP MC-1724 8811". It has five leads coming off it labelled 1,2,3,4,5

Here is the schematichttp://bee.mif.pg.gda.pl/ciasteczkowypotwor/%23pro_audio/Gallien-krueger/Gallien-krueger_250ML,_250RL,_212SCL_Service_Manual.pdf

 

Are any of you wise in these things and can point me at an equivalent designed for 240V mains?  

 

I took it to an amp tech but he kept it for a month then gave it back to me, saying the change was "uneconomic". But it seems like a fun project.