Homebrew PCBs

I like using my 395 Dremel rotary tool for drilling holes using the tungsten bits with the 1/8" shank.

I have it all set up and its stable.

However, I only have the tungsten sizes:

.05 - .062 - .0787 and 3/32 these are not near small enough for pcb work except the .0500 which destroys the smaller pads.

Been all over eBay and can only find - used - refurbished that are close, but they are not very assorted in size and many sets only have a few of the sizes I need smaller than .050

Example: "set of 50 - .0400 resharpened in plastic case"

The size is good but don't need 50 of the same size.

Does anyone know of a good resource for an assortment of the sizes we need for pcb work?

Thanks 
Bob AD5VJ