I'm not sure what problem you are trying to solve or question to have answered. If I am correct in thinking you are trying to setup the fuel lines on your Hcalory you will find numerous suppliers of the needed parts on Amazon and Ebay. Most list they fit both Espar and Webasto. The come with the nylon tubing, hose and clamps for connection. The are inexpensive and worth a try. If you want confirmation of what to use Hcalory has a support line.
Contact Us - Hcalory Give them a try, they may help.
As for what I used I have not yet made any modifications to my Hcalory. I purchased one of the
all-in-one heaters to test out heating my shop. It has the soft green fuel line that will fail. When it does I'll order one of the kits.
I will make the comment that while it is listed as an 8KW unit it does not produce anywhere near the heat the old Espar 8KW in the boat does. If / when the old Espar goes to the great beyond if I go the Chinese heater route it will require two to try to keep up with heat the Espar produces.