There are 22 different models for the Glock 43 for IWB, OWB, Appendix carry and so on.
I've used the Standard IWB Ventcore holster for both my Glock 23 and 19 for the past 2 years and it's held up well, very comfortable even in the humid Houston summers.
IWB Ventcore and Revolution Holsters for the Glock 43:
https://stealthgearusa.com/holsters.htm ... 3&model=98