Pinterest has a bunch on there. Homemade and to buy. But be warned, take all the homemade stuff with a grain of salt and you’ll start getting chainsaw stuff from them every day in your email.
I took a "gamble" and bought a Saw-Haul when they first came out. So happy with it I purchased a second. The first goes right on my Kubota BX25D with ZERO problems and works VERY well. So happy I am with the product, when I decided I need carry TWO saws, I purchased a second. I have an Artillian ROSb bar on my tractor, and simply attached the 2nd SawHaul to a piece of scrap aluminum, which clip[s to the bar. As a "bonus" I bought a grease-gun holder which I installed on back side of this aluminum -- so I now have both the 2nd saw and a grease gun. You can see the SawHaul -- the 260 PRO is not in it -- I had a huge chunk of an apple tree in grapple.