You can purchase a replacement tabletop for patio furniture from several sources, including:
Home improvement stores, 1800ceiling.com and other home improvement stores may carry replacement patio tabletops in various sizes and materials.
Online retailers: There are many online retailers that specialize in patio furniture and offer replacement tabletops. Some examples include Amazon, Wayfair, and Overstock.
Patio furniture manufacturers: If you know the brand of your patio furniture, you can contact the manufacturer directly to purchase a replacement tabletop.
Glass shops: If your patio tabletop is made of glass, you may be able to have a replacement made at a glass shop.
When shopping for a replacement tabletop, be sure to measure your existing tabletop carefully and choose a material that is suitable for outdoor use and compatible with your patio furniture frame. Consider factors such as durability, weather resistance, and UV protection when making your selection.