Yes, hi neighbor
If you omit the VHF antenna, you will very possibly eliminate the need for the CH-13 filter. The built-in balun of the 91XG will pass some VHF, but at lower levels.
I've used chain-link fence 'top rail' from Home Depot. It's 1 3/8" in diameter, and has a swedged end. I believe the price is about $12 / piece.