alumninum radiators for IIA

[tmckeon88]

Has anyone tried any of these after market aluminum radiators for Series IIA petrol engines I see on eBay and elsewhere? I don't know if aluminum is inherently a better or worse material to use. My '69 IIA is on its third radiator and its fins are starting to crumble so I'm looking to replace it but most Rover branded things are over $400, and these aluminum ones are more like $200. Any thoughts would be welcome -

Tom 1969 Series IIA 88
The Pan-Am 2K vehicle