This is a 7.5 x 13 Fuel Injection Hose, and you can buy this from our host in small quantities.
I offer this if you want in E-85 Rated hose. It is for the 912e.....
and the hose shown in the middle of the photo is is the same as used with your 914 on the motor.
Len.Cummings at verizon.net