I don’t know if you would be interested in a glass lazy Susan turntable designed for an outdoor glass patio table.  I bought one that works and fits perfectly with the Disney castle.  It is 21” with smoked glass at a very reasonable price (less than the $10)

https://www.menards.com/main/outdoors/patio-furniture/patio-tables/backyard-creations-trade-smoke-glass-lazy-susan/md16-ls-001-sm0/p-1444448081585.htm