Rhode Gear used to market a grreat little kit that came with the pre- perforated leather, special waxed thread and a couple of very sturdy needles. Back in the late 70's early 80's it retailed for about $20-25. It took about an hour work to install and is very durable as Wayne mentions. It also looks good. If installed correctly, you don't have to worry about the rain too much and cleaning is as easy as cleaning a leather car steering wheel. I would welcome somebody marketing something like this, even if I doubt that I would now have the patience to do the sewing.
Steven Maasland
Moorestown, NJ