I used the existing switches (Part # 11-14195) which can be found here: https://www.aircraftspruce.com/pages...ag11-14195.php
Mine have a dust cover which have been worn off!
I too like the larger switch hat, but can't justify the $$ for new PTT switches when these work. Eventually they will be replaced, but not any time soon.
Hope that helps.
Cheers,
Po