Read again. EMB120 still in production, but Saab SF340 not. Beech 1900 definitely not produced anymore, check Raytheon's website.
No idea about the galley issue on the EMB120 and DHC8, I guess it is optional and I've never seen it. But the good thing about airplanes still in production is you can ask the manufacturer directly...
Btw, given your requirements: take full pax load with 15kg bags each, a toilet, a flight attendant and a galley, you can already rule out most 19-seater airplanes... They will be way over max zero fuel weight...