A pager will be a cool mod lol I forget almost what they look like. I have a few laying around here somewhere too..
You can make a switch with spring steel. I made a uber mini mod with an NJOY empty case, its pretty kewl and I used spring steel for the switch.
My fear was the glue may fail and if it did it would fire constantly, so i have it for display and maybe one or two toots every now and then..
I cut and used the spring steel on a 12v car lighter adapter. IDK you can maybe glue it with epoxy to the pager button; using the top deck as connection links but that area is uber tiny.. It can be done, the njoy enclosure is 100% smaller than a pager.. I have another mod thats VV and goes on my keychain but I used a fet . I think it the tiniest most powerful ecig in the world lol. Be careful when batt is in if working with it, I blew a hole in my finger with the njoy mod yep a hole --its so fast you cannot believe how fast when shorted..