Personal Assistant - how do I find one?

Hi all, I am looking to hire a personal assistant having been assessed as needing one through social care. 

I am apprehensive to post to Facebook, even anonymously, in case someone I know realises it is me. I have created a google form as a sort of application.

My question is, where can I find one? I need to hire someone who is a self-employed PA, I can't be their employer.

Any advice is hugely appreciated, thank you.