You can use Korky replacements parts
The fill valve is the Korky Quietfill.
Repair part for the Korky is a $2.50 part
Some hardware stores carry the Korky 3" flappers too.
Thanks so much for everyone's suggestion. I have decided to buy the TOTO Drake ADA toilet. Don't think I could have made the comparisons without your help.
I have located a TOTO dealer but, the dealer is 100 miles from my home . Do I have to use TOTO replacement parts, or can I use "generic" parts?
Researching toilets to enjoy retiring in retirement