I'm looking for "connectors" made of plastic or metal that can connect
wooden dowels together at 90 degree angles, and in other ways as well. Does
such a product line exist? I'm having no success scouring the web for such
a thing, but maybe I simply do not know the name of them. I also tried kite
supply shops without any success, thinking that such a hobby would have
wooden dowel connectors.

Thanks