Hi Len,
I added a leather rim to by boat stainless steering wheel, I'll see if I can find some photos.
Not the same exactly, but similar theory. I got some 'second' leather hide from a local tanner, and needed a strip around 80mm x a good 1.5M. If you have a decent sewing machine ( I have an industrial mc), you can fold the hide lengthwise and sew it without any thread, using the largest needle you have, just to put in the matching needle holes down each side. Use some nylon upholsteres thread, sew both ends together, making it tight to stretch over the circumfrence. Then stitch it using 2 needles in the cross pattern (plenty of youtubes on stitching this).I used red thread which looked good, very bling. Since my wheel was stainless, the hide would move around, so some thin doubled sided tape was useful to hold it in place first.
A bit of time and she'll come up a treat.
Let me know if you have a spare 3 spoke wheel taking up too much time in your shed that you dont need