I know of a few who can help you. What exactly are you looking for, what type of treatments do they need to be able to do, just the basics or do advanced everything? How often do they need to come in to the salon and what personality are you looking for, someone quiet, professionals yet enjoys a laugh or have they got to be larger than life? They need to fit in with the rest of your staff so if you have staff who are really bubbly there's no point sending in someone who is very reserved as they won't fit in.
What post code are you in as we will make sure we only recommend people who do not have a clinic nearby your salon to avoid a conflict of interest.
forgot to add, hence the edit, how experienced do they need to be, I can recommend very experienced injectors who charge a lot for treatments or fairly new but great injectors who are probably a little bit more competitive x