Trek Compression rifle. Where do I buy the 'seatbelt'?

[Funky]

If I remember correctly, the straps on the compression rifles were retractable seatbelts. Are the correct ones still available?

 

[blufive]

I'd be interested in seeing more info on this. Consider this a friendly neighborhood "bump".

 

[jhusel]

I believe it was a retractable seatbelt made by Superior.

Jhusel