Coolant recovery tank on fender

I have a 71 Dart. I would love to find a coolant recovery tank that mounts to the passenger side fender (relatively flat surface) similar to how the windshield washer fuild tank mounts on the driver's side fender.

I have been scrolling through ebay pages for hours, as well as searching this forum. There's pretty much 2 kinds that I find. The first kind are metal cylinders/bottles. The second kind are formed plastic tanks of weird shapes and sizes.

Does anyone have, or even seen, a simple flat-mounted recovery tank that could be mounted on the passenger side fender? It would work perfect!

Thanks.