"Tom Horne" wrote

I am open to any suggestions
providing that they can be done in a yard that allows me only a ninety
foot span between supports. I suppose I could save up and buy a new
coupler but I was hoping for something a little less costly.

I think the simplest solution, and an inexpensive one, is an ordinary
"random length" dipole (in your case, 90 feet long) fed with 450 ohm (or 300
ohm) plastic window (aka ladder) line to a transmatch (aka antenna tuner) in
the shack. With a 90 foot-long antenna you can work down to 80 meters on it.
Since there are several variations on how to get the window line through the
house wall (one of which includes two identical lengths of RG-8 coax), and
there are numerous commercially available transmatches with a wide range of
prices, you have many options that can work well for you. I use just such an
arrangement, though my dipole (actually a somewhat inverted-V) is 140 feet
long with an apex of 39 feet. It works great.

Howard N7SO in NY