Quoted from Fast-Ed:Where did you get them? Ed
I could only find them in the US on eBay. ebay.com link: Molotow ONE4ALL METALLIC BLACK Acrylic Premium Paint Marker 127HS 2MM Tip Refill
That one has a 2mm tip. It works well in conjunction with a circle template for insert edges and thicker lines. It is a tad too thick for fine line work. For that, you'll want the 1mm tip. You can buy the tips for them. These are also re-fillable.
Here is the 1mm tip version: ebay.com link: Molotow One4All Marker 127Hs Xfine Black