Build a dual-band low-noise amplifier for 2 meters and 70 centimeters” by kim kocsis WA9PYH is on page 48
https://amatortelsiz.com.tr/wp-content/uploads/2021/02/CQFeb2021Fiby2C5.pdf
BUT, if you have 2 Forty Meter transmitters side by side can you then transmit on the 80 meter band?
The real question is why? It’s still not going to go THAT far. Or at least I’m not sure why you would want to go that far when you have better rigs going further without amps.