Wealden have started selling a range of replacement collets too.
I didn't check for Makita - they had the lot for T10 T11 DW 625 etc. and they didn't have 8mm for small Boschs (but I already have one) - it's not a comprehensive range, but worth looking as postage should be minimal, even to Cyprus.
That said, Miles are a good company, and I've found them very helpful. You can check online. I foundcTeend collets were cheaper as parts than accessories a few years ago, but I think that trick has been spotted by the retailers now. There is a LOT of markup on collets!