Convert from 4 tuner to 2 tuner

No but plenty of options for signal amps out there.

Personally this has been the best for me:

http://www.kitztech.com/KT500.html

But this one did ALMOST as well for 2+ years:

I only upgraded to the top one to try to get ONE more fringe channel.

Either way though,an LTE Signal filter is also likely needed: