I'd like to announce that I just released complete HDR sIBL sets for all of my HDRs on the HDRSource website:

www.hdrsource.com

All sIBLs are included with the high-resolution version of the original HDR file. People who have previously made a HDR purchase will be receiving the corresponding sIBL files free of charge. If you have a moment, please head on over to my website and check them out!