Their website is a little convoluted, but the parts are there.
If yours is a 14' round trampoline like mine, this is where you'd find the pad:
http://www.jumpking.ca/parts-retriev...Model=JKTR14AB
Here's the 12' pad:
http://www.jumpking.ca/parts-retriev...Model=JKTR12AB
15':
http://www.jumpking.ca/parts-retriev...uModel=JFTR15E
Haven't used these guys as I found their pricing to be a little higher so I can't vouch for the quality of the parts, but might be worth a try:
http://www.play-factory.com/html/container.cfm?a=c&l=e