is your bowl plastic or ceramic? Even your toilet at home has a plastic seat, no such thing as a ceramic seat that I know of. You could upgrade to a ceramic toilet. My new 5th wheel has a ceramic one, so much quieter to sit on than our previous all plastic toilet.
David & Lynn
2014 Coachmen Chaparral Signature 327 RLKS
2016 Ford F350 Lariat CC Dually