I am guessing you tried an MK8? It looks like it but the thread pitch might not be correct. If it isn’t an MK8 personally I’d look at swapping the hot end to something else.
The Zortrax Nozzle is on the left and the Mk8 is on the right. They’re different in a number of areas - the biggest one is the difference in the bottom opening.
The Zortrax printer uses a 1.75mm diameter filament printer and there’s a metal pipe that extends from the heat block into the nozzle (just in case people think I mixed up a 3mm filament printer with a 1.75mm).
First off I am sorry it looked like a mk8 from the original image I assumed. I’m old enough to know better. With a proprietary nozzle you are best ordering from the manufacturer, or hunt through the suppliers.
I wouldn’t feel comfortable drilling out the nozzle in anything other than a lathe and, as I don’t have access to one, I guess I’ll keep buying them from Zortrax or anybody closer that can get them to me cheaper.
My Zortrax M200 printer hasn’t been actively supported for at least four years and, while it has been quite good, what parts are available are quite expensive and it would be kind to say that it’s not easy to repair - nothing is accessible in that printer without a minimum of an hour or disassembly. The only reason the nozzle is still available is that it’s used on the M300 Plus, which is still being sold.
I went through a really horrible and very expensive experience with Zortrax and my “Inventure” printer when they took away TPU support so there isn’t a good or long relationship there.
When something breaks on it, I’ll probably give it away to somebody looking for parts.
I have a lathe and I could try to make one from a MK 8 Nozzle but I would need one of the originals to measure, If you think yours is close enough to a MK 8 to succeed.