66 K10 Suburban - Notice to Operator

[Southcity]

Both the "Notice To Operator" and "4x4 instructions" interior decals (left & right of rear view mirror mount) in my K10 are in pretty good shape but.....

1.Curious if anyone has any suggestions on a good way to help preserve them so they stay this way?
2.Has anyone had to reproduce these for their own vehicle? If so were you happy with them? do you have any recommendations for a resource?

Thanks in advance.