The Yum Muy grub was very durable, inexpensive, and caught fish. It sucks that they are gone, but there are LOTS of other grubs that will work just fine. That Ozark Smoke color was a little unique. Look on Tackle Warehouse. They run good specials on the Tiki Grubs from time to time. The Shad color is a decent replacement for the Ozark Smoke. Not really a look a like though.
Bass Pro has a nice little grub (XPS), but they are awful proud of them.