There are of course, 20 foot mating sections for 45 to 55. However, I don't believe Rohn ever made any 25 to 55 mating sections. I agree with KI7WX, it is just not an economical way to go anyway. By the way, I have available, several new 45 to 55 adapter sections, brand new, never installed. Reply off the reflector if interested. Bill K4XS