Hey I know you said you didn’t feel comfortable with a race holster yet, but once you get to that point I have my MPA hybrid set up in a DAA flex holster.
If you follow the steps to set it up correctly and shim it properly with the provided shims, it’s actually really secure.
There’s also a locking mechanism that you can flip on and off between stages.
Otherwise, like others I’d recommend Red Hill Tactical.