Ah just seen the radiator in the images.

This is just the same as a Honda Civic alloy radiator, available for about £50 off the Ebay.

I discovered they fit OK a few years ago and a few use them on the GTti, they look nice.

Looks like the Sirion one has the bottom hose outlet slightly further across, but that's a very easy mod to do, just use some superflex hose to make it reach.

(Or even if taken to a radiator or intercooler repairer it would'nt cost much for them to reweld the outlet)

Bear i mind i also did some temp checks with a probe, and the alloy rad offered no extra cooling benefits to the standard radiator. But they are nicer to look at and at £50 cheaper than a standard recored radiator.