Thelin Thompson stove - steamer question

[AndiSF]

I just bought a Tahoe cabin with a Thelin Thompson stove in it. It has gnome legs and i believe it is from 1984-ish. Unfortunatly the seller took the custom steamer kettle that goes on the top of the stove, and is unresponsive about returning it. Any ideas on where i could get one? It has a crescent-shaped base.
Any idea what this stove's value is, in case i have to go to small claims court to get the steamer back?
I really want it! The stove was one of the reasons that we bought the house.
Thanks for your advice! Here is an image, also attached.

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[begreen]

Would this work?
(broken link removed)

 

[AndiSF]

Would this work?
(broken link removed)

Thanks for this thoughtful response! I will measure this weekend.