go to http://www.technicskn7000.com
register, go to the software page, and read the "download instructions" document which gives the options for your 2600. This will explain how to download all the kn5000 styles for your SD card.
Alternatively if you just want the one style there is an alternative.
Download the floppy disk versions of the kn5000 styles in the kn2400 section, unzip the one you want to a floppy and using the Song Manager software you can load the single style you want on the computer from the floppy and send it down the usb cable to the 2600 panel, and then save it to an SD card on your 2600.
However since the 682 styles on the site you can use on your 2600 are free you may as well take advantage of them all.