That's a clone of this soldering station:
https://www.amazon.com/gp/product/B0029N70WM
...and so these tips should fit it fine:
https://www.amazon.com/gp/product/B0029N91Q0
Let me know if you'd like me to measure my tips (diameter, etc) to verify.
Very few reviews of any sort... and all glowing. That's spish.
Oho! Now 11!
Where would you get replacement tips for it?
I can personally vouch for this one: