I know my local Menards has pocket door hardware, as well as similar hardware for shed doors (can't get much more 'industrial' that those!).
In much the same way, both Home Depot and Lowes have pretty good web-sites.
Speaking of the web, here's a link that might be helpful...
From the Builder Online site...You are in a conversation called"POCKET DOOR HARDWARE" inside the "Construction Tips" room...http://builder.hw.net/talk/list.sht?FID=1&SID=453&MsgID=1854
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