After doing a bit of reading and searching both on here and around the net, I figured I would post up a couple tidbits of info I found. All the old posts said the best timing set was the Rollmaster CS5302 available through hp_mad_dog on ebay. I couldn't find that seller on ebay anymore, or the Rollmaster timing set available anywhere online (If you call Rollmaster directly {616-247-6572} they still have them). The only double roller timing set I could find online was the JP Performance JP5613 on ebay by fastengineparts.com. A quick phone call to them revealed that they are the new name for hp_mad_dog. While on the phone with him, he mentioned that JP Performance is a subsidiary of Rollmaster, but that the JP sets don't have the nitrided gears.

For what it's worth...

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Not sure why you would nitride the set anyway, the chain will stretch before you wear out the gears in double roller timing set (I have a dynagear double roller set with 50K on it and it's not loose at all...and that included hard high rpm hyperpak launches in that time as well...). Nitriding is best served on a high wear face item backed by good metallurgy (like a billet cam running high rpm).

-D.Idiot