[GreenKeys] Wanted - An optical 8-level paper tape reader assembly

[acti at provide.net]

There used to be simple optical reader bars
for 8-level paper tape consisting of a row
of 9 photo-transistors in a squared-O clip
frame. It was typically illuminated by a
long bar 12v automobile dome lamp bulb.

I need some of those, for a project.
Are those reader bars still available anywhere?
If so, can someone give me a link to one?

They were a common item during the 1980's.
It allowed a very simple micro to read punched
paper tape simply by yanking it through the assembly.

Interfacing them was easy - two chips (an 8-bit
latch, and a flip-flop) and a trigger debounce
circuit.  The smaller sprocket hole photo-transistor
triggers the latch to grab the data, and raises
an interrupt flip-flop.  The micro clears the
interrupt flop once it read the byte.

I could probably design and fab a frame for
a row of opto-interrupters to do this job,
but for precision and speed I'd rather just
buy a pre-made assembly IF that's still possible.
(I still have to make the interface...)

Are those optical reader bars still available
anywhere? If so, where?

Thanks!
- Keith Mc.