go to a local electro shop, i am sure they know where to get one

always discharge the CRT

pram battery is soldered

cut it of

if you want a pram battery

buy a wired battery holder, solder the wires, + & -

but

you don't need a pram battery to start up a SE FDHD

in old macs, never leave the battery in place

always remove them

no battery = no leaks