Where can I buy a genuine armillary sphere for astronomy?

I am just looking to see if anyone can tell me where I can buy a genuine armillary sphere built for astronomy. I have seen plenty of reproduction ones out there with fixed latitude axis' meant for decorative purposes, but can't seem to find any which are actually meant to be used. Any help is very much... show more I am just looking to see if anyone can tell me where I can buy a genuine armillary sphere built for astronomy. I have seen plenty of reproduction ones out there with fixed latitude axis' meant for decorative purposes, but can't seem to find any which are actually meant to be used. Any help is very much appreciated! Thanks!
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