Rev slider version not compatible with php

I realize that you don’t sell or support this theme anymore but hoping there might be a solution. I have a couple sites that I used this theme for and the hosting server is going to force a php upgrade to something higher 7.0.33 which will break the site and its because the version of rev slider that came with the theme isn’t compatible.
Of course there are other sliders out there BUT I need one that integrates with the theme and lets be insert it properly in the header (ie. meta slider wont go full page if I have a sidebar. See http://www.foresttravelservice.com where the slider isn’t full width).
Anyway, I know this is a shot in the dark but hoping I can get a workaround suggestion? Otherwise I’m into redesigning a handful of websites that I used this theme for…

Thx!
P.S. I hope you never abandon HighEnd or i’m sunk since i’ve purchased it at least 20 times!