GTI6 Radiator Buying Advice

[Eeyore]

Hi All,

Never had to replace a rad in my life. The radiator is bust on the 1.8 as its leaking from the bottom passenger side. I presume 1.8 and GTI6 rads have the same inlet and outlet points. Whats the best one and place to buy? Ive heard Nissens? thrown around in the past?

thanks