StickerShield

I'll let the Boss decide on this post....
 
But... my suggestion, as just someone that glues plastic to glass... Do a google search for window tinting tools.
 
There are a bunch out there. 
 
Also - many (all?) film suppliers also sell tools. Sometimes it's easier to just have them throw in this or that with a roll of film. 
 
 

It's not against the rules, we have sections that people can list their businesses and so on. As long as it's industry related and not spamming, it's not a problem.

Most of us order from the same people we get our film from.  Like Roach said, there are few independent tool companies that only sell tools for installing film and don't sell film also.  Google search window tint tools and you'll see all you need to know.  
 
Good luck.