You and me both... I just tried the website and same deal, no way to add to cart. It seemed like he didn't keep much in stock, he didn't have a lot of good cores and stuff. So it would make sense that they aren't selling them right now with his passing. Last I knew he working with Delta Cams here in WA. I know they have a shop in Tacoma, don't know if that's the headquarters or not.
It would be best to keep the business going towards his family, if possible. But if they aren't doing cams anymore, maybe call Delta and see if they can duplicate the grind? If you do, get a group order going and I'll be in on it.
The other way to go about it is to use Justin's cam. The dyno info on both cams is out there, they really are quite similar. His is not a "upper RPM" cam while Russ' was a "low RPM" cam. Yes they are biased a little bit each way, but both cams are way better than stock and have very similar torque curves and max HP.