Hi, all! I got in my e-mail from Greg Zaal that his website has all the textures for free!
He gives his reasoning why in a post, linked on the website! I believe the files are up to 8k in size.
He also has a Patreon, and if you're able (one day I hope I'll be), please help him out!
Okay, I'm off to stop my stomach from growling... See ya!
HDRIs are always a great resource. We were talking about his site and such at the CGCookie retreat last week. Sad to see his site go all free, but I'm glad he's doing good on his Patreon. I just recently started buying HDRI packs and completely forgot about this site, so I'll probably donate to his Patreon the next time I need some high end HRDIs.