I actually use one of these as an Engineer, might be a bit tight though diameter wise, it is LED so you can forget changing bulbs, batteries are 3 x LR1 (N) ( last for ever) but it runs on an alternate of 2 AAA batteries, cheap and pretty bullet proof I removed the hanging ring from mine. Very good illumination on it too. Might not look a lot but trust me it gets some serious abuse and has never failed, even dropped it off a building and it still works. Will never go back to overpriced maglights again.
RS | Tools and Tool Storage | Handlamps and Torches | Torches | Pocket & Pen - LED
failing that what about something like these, though I have no experience of them.
Unilite | Tools and Tool Storage | Handlamps and Torches | Torches | Pocket & Pen - LED |UK408
this one might be to narrow a beam
RS | Tools and Tool Storage | Handlamps and Torches | Torches | Pocket & Pen - LED
all well under your price range. As for if you cannot order offline RS have shops all over the place.
They also do a military one with a normal bulb and no batteries LOL
Nitech | Tools and Tool Storage | Handlamps and Torches | Torches | Pocket & Pen |PST1