Here's the URL.
https://www.lehmans.com/p-1551-sewing-machine-belt.aspx
They say they don't carry the leather ones anymore because of quality issues and the rubber is no more expensive than the leather was. There's a video on utube of a person installing one of these and it looks like one end just fits in to the other.
Video
http://www.youtube.com/watch?v=EIGuctAaRDc