I've just exchanged emails with Heidi Strantz, Mike's wife, who tells me that there will be more of Mike's sketches available in the coming months. She was very gracious, and responded to my question very, very quickly.
Also, it is noteworthy that a portion of each purchase goes to the Hollings Cancer Center in Charleston, where Mike received treatment, and donations that accompany the purchase price will be used to both promote awareness of oral cancer and to help the families of cancer victims who are under financial pressure.
I've purchased a couple of prints; a pen and ink of the 14th hole at True Blue, and a watercolor of the 8th at True Blue. I love both of these holes, and lithographs by Mr. Strantz will be wonderful to own.
I'd urge those of you who are fans of Mike's work to keep the thread going for a few days in order to make sure that word gets out as far as possible. Again, thanks to Mike Whitaker for finding this and posting in the first place.