Riaan, here's my secret advice: step to the other side. Volunteer to be a model, either for photography or life-drawing.
First, it puts you in contact with other "models".
Second, it establishes that you are not asking people to do what you wouldn't do yourself.
Third, it creates a certain empathy... you have some idea what the model is experiencing.
It also gives you a means of choosing to work with photographers whose work you respect, who are likely to work with other models who are interested in that sort of work. In contrast, if you go onto a Facebook model-photographer group, the majority of participants will be naive and ambitious people trying to make very stereotypical images in the belief that they will help them earn a living in the field. It is (almost) all about fashion and make-up and lies, so far as I can see.
Also, I put "models" in quotes because I don't work with women who see themselves as models: they are musicians, artists, actors, dancers. They may also be teachers or whatever... but they don't see themselves as having a career in modelling.