Quick condenser question

Probably a stupid newbie question, but how specific do you need to be when buying a new condenser?
I've got a 4 pole 6v non-battery Li125 with a Filso condenser and I'm struggling to find a direct replacement that looks identical to the one on there.
How important is it to find a Filso one, or will another one do the job? I'm sure I've read somewhere to keep matching parts.
I've got a 4 pole 6v non-battery Li125 with a Filso condenser and I'm struggling to find a direct replacement that looks identical to the one on there.
How important is it to find a Filso one, or will another one do the job? I'm sure I've read somewhere to keep matching parts.