How to fix Leaky Servowar Supreme Plus?

Hello All,

I have an old Servowarm boiler in my house which was there when I moved in. It's the type that's hidden behind a main radiator, which swings open to reveal the boiler. I know these things have a bad reputation, but it's given me good service for the past 6 years I've lived here. Anyway, I recently redecorated the living room where the boiler is, and I had to keep swinging the radiator open to paint around the boiler cabinet. Having just laid the new wooden flooring I noticed the boiler had sprung a leak! It seems to be dripping from the bottom radiator connecting pipe. I managed to drain the system to stop the leak, but am now without any heating. I can't seem to find this part anywhere as I know the boiler is obsolete. I know I should just change the whole system, but can't afford to do that for at least another year. Does anyone know how I could fix or locate the parts for this? I'd appreciate any help/advice you're able to offer. The boiler part number is "GC No 41 714 30"

Thanks in advance!