When I bought the Direnza rad from a uk supplier back in late 2019 I am sure it was labelled as PRC manufacture. The Motorstore pictures whilst upside down, I am sure are the exact same product as Direnza.

Either way if you go alu be extremely careful on the installation, those fins are very delicate...! Don't ask.

Thanks, it’s on its way!

Got the radiator, thanks guys!

I’ve got most of the parts needed under control now, but I’d really love a new coolant reservoir, mostly for aesthetic reasons….

Any leads?

You could try cleaning your existing coolant reservoir?

Yeah, I know. But the plastic is faded into this yellowish color, and on previous cars I’ve experienced that they get brittle and crumble when that happens.

Ok, understood....bleach soaking not going to work do you think?

Bleach soaking? Tell me more! How?

Hydrogen peroxide is possibly the answer. If you take a look on YouTube you should find a few videos of people restoring older electronics by soaking the plastic in a solution

It could be caused by iron staining - too infrequent coolant changes/flushes. I have used Oxalic acid in solution in the past, you don't need much say 1/2 teaspoon in 500ml water and it just disappears the staining. Its cheap and will not damage the plastic in anyway, its worth a try.

Exactly

Best buy a new one

Yeah, but where?

No idea, its not the path I would take

Looking forward to the pics