1977 stepside fuel filler hose questions

[hplacecf]

hi.

newbie here.

I have a 1977
c10
stepside
l6 250

recently purchased the truck and am replacing all of the hoses ,belts, etc.

I got to the fuel filler hose (driver side), and found that it is way old and needs to be replaced asap.

but, i have searched this forum and the net and can't find a true replacement hose for a stepside.

I have found threads where people have rigged different things - the simplest being to use the a hose found at oreilly auto parts or amazon (if they have it in stock) gates universal bendable hose.

so, my questions.

(1) what is the inside diameter of a 1977 type filler hose?
it appears there are several sizes, and different threads mention different sizes (which I can't understand) of this type of hose.
I know I can take the hose off, but once I do I fear it is not going back on, and if I can't find a replacement, I am 'hosed' (pun intended).

(2) has anyone used this universal bendable hose for a stepside with success?

(3) since the outside of the hose has 'ribs' what kind of clamp would one use to hold the hose in place?

thanks!