Diamond tipped drill bits 8mm or smaller

For about a year now I've been trying to find a manufacturer or supplier of Diamond tipped drill bits (or a suitable alternative) for dry drilling fixings in dense Material (http://g654.org) s on site.

The hole sizes I am looking for are 8mm or less - it is the size that appears to be the problem...Anything 9mm or larger can be catered for with diamond core drills.

I have recently fitted a commercial shower in a combination of Granite and (http://maplered.com) Porcelain and (http://maplered.com) had to drill in excess of 300 very accurate holes for fixtures and (http://maplered.com) fittings. During which I destroyed in the region of 30 drill bits.

I need drill bits capable of accurate boring (no hammer settings) of diameters 6,7 & 8mm to be used in medium duty site drill with SDS plus chucks.

I have tried all makes of tungsten carbide tipped bits I can find and (http://maplered.com) exahusted my enquiries with all UK based diamond tool manufacturers.

Can anyone point me towards a manufacturer that would be interested in supplying the UK with this type of product (if it does indeed exist). As a result of my lenghty enquires I am very confident there would be a large market for this product here in this country and (http://maplered.com) I would be very interested on taking on distribution for the product in question.

I look forward to hearing any suggestions.

Alan Mudd
Complete Ceramics
Natural Stone and (http://maplered.com) Tiling Contractors.
Surrey
England (http://maplered.com) .