You might like to look at the high quality leather wrist straps on Luigi Crescenzi's website at
Leicatime Luigi Crescenzi : leica cameras leica compur mp elmar 250 reporter leicavit.
FWIW Luigi makes a large array of custom eveready leather cases for Leica cameras. I have one for my D2 that I use constantly and when my M8 eventually arrives I'm likely to get one for it too.
HTH,
Pete.