Donald Qualls
Subscriber
@Donald Qualls Was it https://www.freestylephoto.biz/3541-The-Ultimate-Quad-Cam-Black-35mm ? This looked great but they don't seem to be around anymore.
That was probably one of the ones I've seen. I also recall that there was a fairly accessible mod for the original Action Sampler shutter that would shoot one lens per shutter release press, and not unlock the film advance until the 4th had been fired. That would really do what you're after, but I can't find it with a quick Google.