I have an old Jeep Wrangler which also has a viper alarm/remote start installed. The key fob for the remote start broke off of my keyring a while ago and I always misplace it. Today decided to design and print a snug holder for the key fob and it turned out pretty good on my first try.
I actually came up with a pretty handy way to design the case to fit the curves of the remote without having to do a lot of measuring. I'm detailing my design process from beginning to end and are published on my blog here http://bencbond.com/2016/12/3d-printed-viper-remote-start-key-fob-holder/
This is for the viper model: RPN 7142V
This is a pretty simple piece and am sure the settings can be changed some to speed up the print.