Maybe not what you are looking for but you could simply drill a second hole with a hole saw ,or similar, near the opening and add one of these. 2 PACK Plastic Bottling Bucket Spigot tap faucet for Homebrew Wine Making Beer https://www.amazon.com/dp/B0746GXTV1/ref=cm_sw_r_cp_api_glt_fabc_6MRFWREJRBT4P6D5GAFA
I make 5gal plastic pails with spigot and airlock for less that $15 each.
I got these spigots: https://www.amazon.com/dp/B0746GXTV1/ref=cm_sw_r_cp_apa_glc_fabc_RNF0GQ6B52ZEF3X24K7S
Also needed a drill with a step bit that goes to (at least) one inch and 5-gallon food grade plastic buckets.
Make a hole in the bucket that's just big enough for the spigot to fit. Then put on gaskets (they come with the spigots) and screw the spigot in very tightly.
Here's a solid video of the process: https://youtu.be/UZh5X2R9sTQ
2 PACK Plastic Bottling Bucket Spigot tap faucet for Homebrew Wine Making Beer https://www.amazon.com/dp/B0746GXTV1/ref=cm_sw_r_cp_api_glt_fabc_9H7S261REQH7P62JE71G