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One here, along with a bunch of stargate minis:-https://www.cold-war.co.uk/store/c3/Stargate_Minis.html
Noctilith Crown
They can call it what they want but that thing is definitely a stargate.
I seem to remember that crooked dice did one.Found it http://www.crooked-dice.co.uk/wp/product/stellar-portal/