I'm fairly sure you don't need resistors in this application.
I don't know what I used last time, but I replaced a part that the sam's says was equivalent to ECG 116, the data sheet of which can be found at the below link.
http://www.datasheetarchive.com/dlma...A879000-31.pdf
A few shottkey diodes that meet or exceed those specks should do the trick.