Townshend Audio Seismic sink repair

I have a Townshend seismic sink HD-1 (2 holer) that has a collapsed lung on one side ... it will not hold any air on the one side, and there is a warning on the bottom about the product releasing some sort of chemical if opened ... I have e-mailed Townshend, with no response ... Does anyone know of someone who repairs these things ? ... thanks in advance.