Brook Drumm from Printrbot donated 4 printers to our team during the summer after we sent out a request email to several companies.
He mentioned it on the Printrbot twitter in August and invited other teams to send requests.
https://twitter.com/printrbot/status/760919047030439936
You might have better luck with local companies, there are several start-ups producing decent quality printer all over the world. The hardest part is finding them. (and an appropriate contact email address)