Serving Beer From A "Wunderbar Thermo" ..

[snakebräu]

I bought one of these a while ago and gave up all hope of using it just to dispense draught beer before I got into home brewing. I need a "CO2 Adapter" going by the 'instructions'. This should then allow me to connect a soda stream bottle into the back of it. Any ideas what sort of place I should take the thing to, in a naff attempt at getting them to sell me the right adapter. Just guessed at a cheap "CO2 Regulator" on Amazon which I now have to send back.

I can get pictures etc if that helps...