There are a number of different websites that offer pre-built JP1 cables and JP1 kits for sale including Hovis Direct, BlueDo, and Surf Remote Control. The Database section of the JP1 Users Group also contains a list of sellers of JP1 Cables and kits.
You can also do a search on ‘JP1 Cable’ in most search engines to find a list of websites selling JP1 cables.
You should purchase your JP1 cable. Once you have your JP1 Cable, you can use the JP1 Self Help Guide to point you in the right direction to program your remote.
Reference Links
http://groups.yahoo.com/group/jp1/database - Link to the Database section of the JP1 Users Group, which contains a list of sellers of JP1 Cables and kits.
http://www.hovisdirect.com - Link to Hovis Direct website which sellss pre-built JP1 Cables and kits.
http://www.bluedo.com/bluedocgi/product.cgi?model=JP1-Cable - Link to Blue Do website which sells pre--built JP1 Cables.
http://www.surfremotecontrol.com - Link to Surf Remote Control which sells pre-built JP1 Cables bundled with One-for-All remotes.