Years ago (greater than 10) I did use a window perf that had no adheasive, and here is the part I don't rcall, there was a transparent adheasive only material you applied to the face of the print and then apply it to the inside of the window or you could have applied it to the window and place the graphic over the adheasive. They just removed it after over 10-years, it worked great, but you will need to use at least a 60/40 perf, and as suggested above check the tint on the glass, this may not benifit inside application, perf or non-perf. Also if using perf, if the business leaves the interior lighting on at night the perf may not be the choice however the clear with the white blocker, the interior lighting may work as a backlite
sign.
I was asked to do a perf project 2 years ago with it applied on the interior and found this material "DAF Gecko-Grip Interior Mount Perforated Window Film - 60/40 One Way View". You do print on the adheasive and it worked well and looks as good as the day it was installed. I attached a picture of this, everything but the door was covered.