Hi, I have Mojave installed on my E7240, and I'm using following kexts and drivers:
If you want, I placed my guide for installing Mojave on E7240 here: https://www.hackintosh.com.pl/forum/viewtopic.php?f=11&t=29
The guide is in Polish, but you can use translator if you want. In this guide I placed my Clover EFI folder, config and the drivers I used for.