Dumping the stock coolant recovery tank

As I don't have "x-ray" vision finally decided to dump the stock coolant recovery tank. Reading a few articles here on upgrades. Like stainless steel or aluminium construction. What is available at the present time that will bolt-on without creating a "major military manoeuvre" in fitting (ie, I have my hands full working on SMLE wood stocks right now)

Check out @Mittzy made stainless recover bottles. As a matter of fact he just got a new batch made, and MIGHT still have one available. See below: