Hi Flyera343,
I drew up a table for runway slope, as I too was frustrated by Jepps' lack of data in this regard.
The shaded area shows gradients in excess of 2%, which is the limit for most types.
You can download it here:
Runway Slope Table - PDFCast.org
Enjoy! (But remember it assumes a uniform slope between the thresholds)
Hope this helps,
Eck