Draper and Snap-On are too brands that spring to mind, although they probably make a range of tools at different quality/price points.
If you have a look on Ebay, you'll get a feel for what is cheap/value for money/premium.
Once you have an idea, then you can Google those brands and see what comes up: I'd think that on-line will give you the best prices, but you could try independent hardware shops, car accessories suppliers etc; they might be a good source of advice too.
I'd steer clear of Halfords, but bike shops would be a good bet: ask them what their mechanics use.
I don't see why swapping chains wouldn't work; the handle is no different, it's only the chain that does the work.
Not entirely sure about breakers: I don't have any 1/8" chains to check mine.
Try this: http://www.cyclorama.net/viewArticle.php?id=5
Draper and Snap-On are too brands that spring to mind, although they probably make a range of tools at different quality/price points.
If you have a look on Ebay, you'll get a feel for what is cheap/value for money/premium.
Once you have an idea, then you can Google those brands and see what comes up: I'd think that on-line will give you the best prices, but you could try independent hardware shops, car accessories suppliers etc; they might be a good source of advice too.
I'd steer clear of Halfords, but bike shops would be a good bet: ask them what their mechanics use.