My split hose happen in Italy on a Classic Car Tour (just outside the Ferrari Factory - very embarrassing!) It cost me £220 to have a replacement shipped by DHL (very efficiently I may say). The Morgan factory were obstructively unhelpful.
I found on the interweb a firm than makes silicon seamless fuel & ethanol resistant filler pipes. I gave the details to Morgan but, unsurprisingly, they still fit the rubber ones.
Plus ca change ......
John