Try A&H Enterprises in Tustin, CA. Telephone 714-258-2525. I had a Princess
stove that I tried to rework (i.e. refurbish burners). I believe it uses the same 209 alcohol burner which if I recall correctly is made by Optimus.
In my case I gave up after breaking tubing on the
stove while removing one of the burners. A&H took the parts back with a small restocking charge. While I was doing the repairs they were very helpful with assistance over the phone. Ultimately, I replaced the whole
stove with an Origo. Much, much better heat output (boils water almost as fast as an electric
stove).