Skyboy Airplane

Does anyone know how to get in touch with people involved with the Skyboy Aircraft (Interplane Aircraft) that was designed in Zbraslavice - Czech Republic? I know the design is no longer being produced but would like to investigate if the engineering drawings, jigs & tooling, and composite molds might be available for sale. I know there was a Ralph Mandarino, Bill McClung, and Ben Dawson involved in the USA side of things. The ideal contact would be someone that ran the company in the Czech Republic ... Thanks for any help of leads.