The site I linked has a
2.5 mm straight flute carbide bit but not a 2.6. This site has a
2.6 mm Tungsten carbide bit, but it says it's a drill bit and not a straight flute bit. It will do the job but a drill bit is more fragile than a straight flute so you have to be careful and go slow, especially when the tip of the bit is just about to go through the piece you're drilling. I made 3mm holes for 3 mm screws but a 1/8'' bit would do the same job as it is 3.175 mm. Close enough IMHO. I don't know of any places in Winnipeg to find carbide tools.