Hi,

You should try to contact SCROTH Aero.

SCHROTH Safety Products GmbH
Im Ohl 14
59757 Arnsberg/Germany
Telephone +49 (0) 29 32 - 97 42-120
Fax +49 (0) 29 32 - 97 42-42
New!!!
Web: www.schroth.com www.takata.com

These belts have a 12 years lifetime. I replaced mine this winter.
They supply the correct Form1.