It might be easier to acquire the nearest (larger) size locally and run them through a self made dowel pop.
Drill out a piece of found steel with a metric drill bit of the appropriate diameter. Follow with a larger bit to create a countersink shape, allowing the larger bit to just touch the downside opening created by the original bit, without increasing the original bore's diameter.
Hammer the slightly oversized stock through.
You can actually dispense with the acquisition of the original dowel stock and simply rip squared pieces out on the saw, to a width slightly greater than the desired diameter.
Hammer through your dowel pop and you are done.
Regards, Tom.
"People funny. Life a funny thing." Sonny Liston
Thomas J.Watson - Cabinetmaker (ret.) tjwatson1ATcomcastDOTnet (real email)