I found a source of cheap submersible fuel hose rated for internal and external use. The shop is Motorsport Accessories in Brendale the hose is"5/16 STEALTH444 SERIES EFI HOSE 444-06-M EXCEEDS SAE30R10. I bought a metre the other day for 19.64 AU. Today I signed up as a member and got a discount, a 2 metre length set me back $35.35 AU. They also stock the proper EFI hose clips that suit the larger 15mm hose. 
Link to site  https://motorsportaccessories.com.au/ 
Regards Martin.

Thanks for that Martin

I was getting grief getting to the actual hose. Could you please post the URL ... the www..................

I assume you registered. How long before you can purchase for discount?

Regards

Guy

Guy I couldn't find the hose on their site, but I was told by a neighbor that they had it. The best way to get it would be to register on the site and then either email them or ring them direct. Once your registered I believe the discount is automatic, not sure if or when the discount ever expires. Even without the discount it's the cheapest I've ever found. As it's local I'm not registered online so I have to actually front up to the shop.
Regards Martin.

Aussies 1, Brits 0 for once. That's slightly less than I pay for it. Plus I then have to fork out P&P.

Dai  the local Autobarn quoted $100.00 AU per metre. The last lot I got from South Australia was $50.00 AU a metre. I now have 3 metres of the new hose, this should last me a few years if I store it in sealed black plastic.
Regards Martin.