C, I tried doing something related not too long ago. Check it out:

my site and then punch in the word 'fuel' for the search word. then check out the entries i put in regarding a fuel pressure gauge.

in short, i called many many places looking for a length of hose that would work, and no one carries the kind of hose that is required, which is some sort of plastic hosing reinforced by an outer rubber material...except Volvo. i might not have mentioned it in my entry, but volvo wanted nearly $75 for the length that ran from the fuel rail to the fuel filter. by the way, i have a regina system.

i'm pretty detailed, or at least i try to be, regarding how thick the actual fuel line itself is. the inside diameter of the hose IS 1/4".

the banjo fitting is pressure fit (VERY tightly) onto the hose.

also, whatever you do, do not use hose that is not fuel line. fuel will eat right through rubber like nothing.
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Kenric Tam
1990 Volvo 740 base sedan (B230F)
My Volvo 'Project'