I have a condensate pump if you wish it, FOC - just pay for the P&P. It is new, but lacks a donut (toroid) shaped magnet able to act as a float.
It gravity fills with condensate via 25mm pipe, which causes the donut to rise, which is then forms a trigger for the pump to operate. How you get around the lack of the donut - I don't know.
Email me direct if you are interested.