You have two options in 'silver' metal for inlay strips, aluminum and silver.
Aluminum is by far the most commonly used. Nickel-silver is never used, it's too hard.
Alum. can be had in about any thickness desired and silver is offered in 'wire-gauge' thickness.
'Fine-silver' is 99.9% pure and is a very soft mtrl.
Sterling is 92.5% pure with the balance usually being copper to give it body/strength.
I want to emphasize that sterling is not pure silver, though it's a common misconception.
I use sterling in the billets I build for the shafts that require it; Cog, B.Hunter, RC3, etc.
Do some research, an education awaits.
HTHs, KJ