I’ve just been sent a link from WNT **LINK**
Some useful offers in their downloadable catalogue, such as a countersink bit set, drill bit sets and ER32 collet set. I can’t remember the exact prices, except the countersink set is around £12 and the collet set is £70 reduced from something like £250.
The countersinks are good quality (I bought a set a little while ago, along with several other folks on the mig welding forum). No connection, just thought it might be useful.