There is a vendor who sells these little disc's to protect your
mod but all they are is a thin sheet of some type of heat resistant material , i say just make your own if your worried about scratches.
Why not use an adapter, that will prevent scratches unless your the type that must have that perfect look . To be honest no matter how careful you are the thing is going to show signs of wear and get dropped more times than you can count eventually.
I say just
vape the crap out of it.