On Tue, 25 Sep 2012 16:29:40 +0100, Nospam
wrote:

Some of the eyelets in a shoe seem to have developed sharp internal
edges because laces keep breaking. The local cobblers say it's not a job
they can do, but it looks simple; is there any reason not to just buy
some eyelets and a setting tool from eBay and DIY?

No reason at all. You could try a rat-tail file, first.