Replacing One Fuel Tank with Two

Talk to hose supply people

 

I trust the Force4 Chandlery in the UK with international vending. If you strike out searching, they are trustworthy and helped me on a tricky order that I was struggling to purchase.

You ought to join the facebook group trawler living and cruising. There are a lot of cruisers there and they probably know Aussie vendors well for such. Some of the boaters are cruising the planet, so Australia is vending npt somewhere.

 

I suggested installing stainless steel fittings when in contact with aluminum.

 

There is also a chance that you could build two tanks, one on top of another and not lose capacity thought the design and mounting may be challenging