hi, funnily enought i have just signed in to ask almost the exact same question, but im after 90 deg ones, i know aalco do them but there expensive, still looking for somewhere cheaper.
Carriage will typically kill any savings over local sources with small quantities. Don't know about the other two but there's a £40 min order with Allstainless.
Can only speak for my local Aalco but doesn't usually take much to get a lower price- last time i needed 1 length of something for a job just asked if that was their best price and pointed out that i could get it cheaper elsewhere. Price immediatley dropped by a tenner or so
For a handful of bends/fittings i'd be phoning all the local stockholders first
you can try a few process pipe suppliers in brum..
neropipeline ltd are very good on price, not sure what the minimum delivery is, but we tend to go for next day service which is around £12.00,
they have a good selection of fitings on the shelf for despatch that day..
you can try fwb at wrexham but i find there expensive....
check out online 4 processs pipe fittings loads out there...