Seeking Polar for Valentin Taifun

Hi,

A customer just purchased a ClearNav vario from me. I offered to enter the
polar into the unit for him. He flies a Valentin Taifun motorglider. I
have not had any luck finding polar data. I found general information and
wing span, wing area, etc. on Wikipedia. Does anyone have any suggestions
for polar data for this motorglider or one similar. It is somewhat like a
Grob 109 or Dimona - but with retractable landing gear.

Best Regards,

Paul Remde
Cumulus Soaring, Inc.