where can i advertise a dental technician lab?

so i have this small business and its going pretty slow. i am trying get a few more accounts from other dental places but im not sure where to look.

is there a site or something where i can leave my information so that if a dental office was looking for a lab to make their procerlain, gold, lab post, etc. they might come across it and give me a call.

i looked through monster but the way they are set up is for you to hire employees and i dont need anymore. just need more accounts.