Here's a possible helpful link
In the link below, look at post number 33 (on page 3). There is a link for a PDF file by Samson Tire.
http://www.irv2.com/forums/f103/tire-pressure-115624-3.html
This PDF brochure does not have the load/inflation table, but it does have specifications, and it also lists the distributor's name.
At the end of the PDF is this info:
Distributed By Greatlakes Tire Company 4580 Stephen Circle NW Suite 202 Canton, Ohio 44718 Phone: 330-498-5000 Fax: 330-498-5002 E-mail: sales@gtcna.com
Maybe a phone call to Greatlakes Tire could help find a source for the Samson load/inflation tables.
Fred