Simon you don't know what you're getting yourself into.
Those are Earl/Goodridge type hose connectors. That 90 deg one is about £27 + VAT or something - yes just the one connector!
I've got about £250 worth of them under my bonnet.
Never seen any 'plain' ones, but as was said you could get them ultrasonically cleaned - somewhere???
Rally Design, Demon Twits (motorsport catalgogue), SBD, or any otehr serious motorsport supplier does them. Do a search on the net for 'oil coolers' as well cos I seem to remember hose specialists coming up and connectors being on there.
Be warned: I never found anywhere that did these cheap (or cheaper versions), are you sure you wanna go this route? - Are you going to run really high fuel pressure?
yellow pages - hydraulics & hose places - phone em and ask for 8mm internal fuel hose with JIC dash 6 connections one end and 8mm tails the other, they will make them there and then and will cost about 4 quid each plus the cost of the hose. all of mine came to 45 quid and are solid as fook. i think sbd will sell you the hose as well, pricier but easier.