After asking about flying base sources, Blip had pointed me in the direction of e4m, and whilst digging for the requisite bases I noticed that they have a sprue of spaceships which can serve as small flyers for Epic scale.
They are made of almost-flexible plastic, have a mould line which is prominent on some models but is easily removed, and come at
12 for just £2.55!They can be found here:
http://www.em4miniatures.com/acatalog/Science_Fiction.htmlThey're a mixed lot - all quite nice. Four are quite Eldar in appearance, two or three (depending on your interpretation) could be Tau, two are Chaos or possible Dark Eldar (or even Eldar at a pinch), the rest hover around different styles, with 3 small ones being suitable for Imperial fighters.
They're 10-37mm long, but they fit well with most Epic vehicles, and paint up well - I completed one, and will try to photograph it later.
In any case, they're a budget solution: I bought 3 sprues, which means Chaos get at least 6, possibly 9 fighters, the Eldar get 12, and the Tau 9 - will decide about the rest - for £7.65. Granted, they really fit in the Epic design only if you use them for the forces I suggested, and they're not precise matches; and the one looking like an Eldar Vampire (for example) is smaller than the actual GW model. Still, if you're not too picky, they work very well indeed.