I have an alisport for my NAS V8... it's a nice unit, which I purchased and installed about a year ago. I ordered through one of the US-based resellers and they were able to get it through with their bigger order - lead time was about a month.
Unfortunately, about a year in, the radiator developed what appears to be a small leak at the tube/core ends - i don't know how this could happen. But, it must be a very small leak/crack bc under pressure, I don't hear any hissing or see any sprays. But coolant just leaks out at very slow & low pace.
They have a 1yr warranty on the radiators (some products have lifetime) and requires shipping back for their assessment. I installed mine just over a year ago, and i could prob find a local shop to fix this for price of shipping back.