Meet them at industry trade shows.
This gives you the opportunity to see them in action in your field, how they present (in the psychological sense more than the sales step sense), and to spend some time in person with them.
After all, you can ask them to lunch or dinner after you've spoken with them for a bit at the show.
Find out their attitude towards the show: do they resent being there (why? If it's taking valuable time away from prospects they've already qualified, that's a good reason. If they're bored and the company told them they had to attend, that's a bad reason).
What do they like about their current role? Dislike? Look for a match-up to your situation.
Don't expect an instant leap. If they do, that's likely a warning--they'll be quick to jump from you, too, later on. Just give them something to think about...and let it work on them. If they really are dissatisfied with their current role, they'll get back to you.
People buy from people, and remember that you are selling something here.
Shopping Malls when I worked at shopping malls I would get someone trying to recruit me to join their company about once a month. So I would frequent your local mall and find people who go above and beyond in retail.
Look for Rapport building skills
Do they listen and help direct you to products
Do they ask open ended questions?
Often Retail Store managers were the best sales person for that store an other and they got promoted.
These people will have the soft skills of selling and then can be training in the hard skills and tactics of B2B Selling. If you have anymore questions or need any help I'm happy to get on a call.
