Well, if you want to buy, Lowes seems to have decent prices, they offer several. https://www.lowes.com/pd/Fernco-4-in...ngs/1000075333
I have found that Lowes always offers a wider variety of anything I ever want, haven't been in a Home Depot for I don't know how many years.
"It ain't what you're told, it's what you know." - Granny Weatherwax
Some days, the supply of available curse words is insufficient to meet my demands.
Call me a craftsman, artisan, or artistic, and I will accept that. Call me an artist and you will likely get a quite rude comment in return. I am not a @#$%ing artist.