Gamo Viper .177 Cal. Measurement

Dear all,

Do you know Gamo Viper .177 measurement:
- How many coils ofthe mainspring
- Outer & Inner diameter of the mainspring
- Mainspring's wire diameter
- Mainspring length (unset)
- Barrel diameter (without flute cover)
- Piston seal image

I need it to buy spare mainspring & piston seal.

Thank you & Regards