The Rad in my 57 is leaking some at the top tank, both on the seam & where the core enters the tank. I hope to get it repaired. However, I suspect most shops may want to sell a new one that won't be like the original. (my car is on a stock Collectors plate) Can anyone tell me if the Rad is an original type.?  It's marked-  "Rapid R88R Ltd.  O65797"  Thanks.   

Paul