Both Surge Guard and Progressive Industries have a low voltage cut off at 104. That's too low for my comfort zone.
I know of no other devices that will protect you as these will from surges or low voltage. Perhaps you can contact these manufacturers to see if the low voltage cut-off can be adjusted to a higher level if you feel there range is too low?
The ISB Sola Basic and other such devices are regulators which will help to keep voltage close to safe range. But these devices only work within certain voltages which means you can still get high or low voltage. A regulator is not a protector. There is a certain and very specific range within which these devices work. Beyond that range you still need the surge protection.
It seems it is still very difficult to try to get across to folks what these things are and what they do. There is no one device that is going to protect you from whatever.