You can make your own with a std #27 bit and a minute of your time.
That's what I did and they worked great.
CFI-I ASMEL, ATP, B-1900, A319/320, B-757/767, B-737, Flight Engineer-Turbojet
RV-14A kit # 140243 (flying as of 11/18)
VAF 2018 and 2019 paid