I read the opening post here and was wondering how you were going to make the horse. You can maybe make a saddle with a lot of effort and make it look a little like a seat. Makin' the horse might run afowl of some laws on animal husbandry. It'd be easier to just go buy one. Same for the saddle.
But now you've got the proper scabbord. In all truth, it might be the hardest of the 3 for you to buy.
Here I thought I was done when I bought the leg-0-muttion shotgun case made by H H Heiser. Thanks to some help here on the forum, I got my Heiser rife sling. Not really beautiful like the shown scabbord, but as good as any I tend to see in my wondering. Just something else I need to consider in my travels. I passed on the saddle a few years back due to objections from my wife. She wanted to know how I was going to get it home in my jeep filled with 2 weeks of clothes and gear.