Here is the one that Kirby recommended to me.
Its a bit heavy! but it definitely does the job. We strapped it to a John Deere Gator during our Colorado Elk hunt and it held up well and kept my 55" 338AM in perfect/pristine shape.
Long Rifle Case: beaconwwb.com
I don't know where Kirby ordered it from, but $200 was the price.
If some is good and more is better, then too much is just right.
My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives