[Jamie.T]

Hope this is of some help.

Measurements
#60 - 1.02mm
#59 - 1.05
#58 - 1.07
#57 - 1.10
#56 - 3/64"
#55 - 1.30mm
#54 - 1.40mm

So if its 1.30mm bits your after then i found these on ebay: http://cgi.ebay.co.uk/10-x-1-3MM-HSS...item3a4f7d5810