Learner/Earner types: Many of the professional shadcahnim know all types. So I would call them up and ask I can’t think of any shadchan who only deals with learner/earner/working boys.
Look into these organization-
Gateway organization 845-290-8722, gatewaysconnections.com
Binyan Adey Ad 718-256-7525,Fax 718-831-7069,info@binyanadeyad.com
Kesher 718-576-1094,Fax 718-686-6610,support@kesherconnection.com