When I fitted the top hose to the thermostat housing I knew it needed swapping. The tube wall is really thin, and stretched, and doesn't sit tight at all on either end.

Anyway, it's started weeping at both ends.

Does anyone know a replacement, without buying the whole top hose and chopping it, or am I best taking it into someplace and matching something up?

 

I am sure any auto big part,s store will have a hose that has a U section in it & you can use,, I know O'Reilly carries Gates brand, and it's among best hoses you can buy,,

 

I had that issue and just took the original hose to a chain parts place. Cheap replacement.

 

Did you modify the lower radiator hose or top? Is that the lower hose shown in your picture? If not, the lower hose provides better fittment.

Be prepared, you may have to carve out some more plastic out of the shroud to fit the replacement hose.