Does anybody know where I can get an aluminum radiator for a mk5 escort?

 

Not sure if there is anything available off the shelf. Cheap solution if you want something slightly bigger is to use the rad of an Escort with air con, as I think these are a bit wider.

I'm sure someone would make you something. Mat at MDA Motorsport might be able to do you an F2/Maxi style one perhaps.

 

If you've still got the old one. Ship it to Jim at alloy racing fabrication he can make a new one for you.