ANDREW,
I'm not too sure about th rest of th World... but here in America they have Toothpaste that comes in a Double Lined "Foil" tube... Thats what i use for Rifle Straps.
1) After you empty th Toothpaste Tube, cut each end off !!
2) open and Lay Flat.. inside facing up !! it needs to dry out.
3) Wipe out any left over residue.
4) cut to shape with Exacto #11 blade. You may want to also use P.E. buckles,but not nesassary
5) Paint & attach !!! it holds it's shape with out any undue effort. !!!!!
ENJOY... hope this helps !!!
ERIK
WHAT DO YOU CALL THE ASSASSINS THAT ACCUSE THE ASSASSIN???