The part number is B100K0073F, described as "Hose Joiner-Long"
It isn't shown in the UK parts books but it is listed after item 27 in Elan-M100-Parts-Guide-v8-(S2) page 292
www.lotusm100.com/manuals/Elan-M100-Parts-Guide-v8-(S2).pdfThis is a large file, so give it some time to load
Current price from a Lotus UK dealer is £20.92, Dave Bean last listed it for $39.59.
I believe your tape job is around 90 degrees out, it should be in line with the existing segment and make kind of a horseshoe with one end longer than the other.
My paperwork suggests I have a used one, but I will need to find it and check to make sure it isn't damaged.
I would make a temp replacement out of flexible copper pipe (Lowes or Home Depot) and just use two clamps at each end.
It connects the bottom hose side nipple with the branch hose that goes to the heater.
You could always go to a Pirtek branch (google pirtek oklahoma) and have them make a new one for you?