Sometimes the Dollar Stores have them. WalMart might have them.
Dollar tree...literally boxes waist high cover their front sidewalk currently. And some came in mesh bag sets of the bucket, but then inside that were non- bucket castle molds that were smaller...maybe 3-4, with a kinda flimsy shovel. It's a fun kids set from dollar tree.
But depending on your intentions...you could use plastic appropriate spray paint primer, and paint, glue...glue embellishments on those things or glue those things onto something else. Could even turn neon kid beach dollar toys into classy beach wedding props! Heeeaayy!
Hello Shelly -there is quite a few links on Amazon. Have a look here.
Hope this helps.