It's weirdly set up. There is a button on the front that says, "DIGITAL TBC/NR". This is a single button with an LED beside it, it's an on-off button. That's the only specific "TBC" control on the whole machine, taking menus into account and all. Like I said, I always turn that off.
Now, within the menu area of the VCR there are several options for picture, none of which say anything about "TCB" or "Time base correction" or anything specific like that. There is "Picture control," "Digital R3," "Video Stablization". I know for a fact that some JVC's that don't have TBC do have "Picture Control" and "Digital R3" as features. So I'm just thinking that maybe there are also some JVC models out there that have in their menus "Video Stabilization" while not having TBC (as with D3 and PC). Maybe TBC and VS are so intertwined in the hardware somehow that you'll never find one without the other, but at least from the controls and labels given to me as a user of the machine, they are not offered to me as the same thing, and you requested something alternatively featurewise to look for so there it was.
Regarding where to get one, I got mine off eBay a couple of years back. I didn't want to get one off eBay, but that was me giving-in to the fact that I couldn't find one anywhere else after weeks of looking around the net. Sorry I don't have anything more specific of help in that area. Hope something turns up. People really are moving away from anything having to do with tape so I'd think something would come your way.