Yes, the Lansky system has room for improvement. But at least it helps to stay at an set angle. Although - and I guess thats similar with your thingy, it can be difficult if the knife edge has curves. And if it is big. Or both. I had a few patients like that, and I'm not really sure that its easier to use such a guided system, or rather do it with a oldfashioned stone.

For knifes that are used often and frequently, such a steel is great. I have 2 of them, one from "Zwilling" that I got 50 years ago during my apprenticeship as a chef, and one from "Dick" that I bought a few years ago for the super long knifes, its about 14 inch long. The Dick steels are the Rolls-Royce of steels. And a Rolls-Royce has its price.... :)
Well, a leather strop is fairly easy to make yourself in the size you want. If you can find the leather for it, that is. But you live in a rural region, perhaps there are still saddlers or similar shops around there.
There are 2 kinds of strops: the flexible ones, mainly for razors, as you would see in barber shops. And then the rigid ones as I described, thats better for bigger and curved knives. The polishing paste is the same for both, usually containing Cromedioxide or diamond dust. You can find all this on Amazon, too.