Thank you
@XfbodyX (and
@Aspen500)!
I looked a year (or two?) ago and didn't find any direct replacements.
Standard Motor Products show two battery cables:
Negative
Part number A19-4U
This one is close but not exact. It is close enough for me and I have one of these on one (or maybe both) cars.
Positive

A60-6C
The above picture is very close to what we need. The yellow crimp connector can be cut off and a correct looking connector can be made so it looks darn close to original (except for the wire colors)
BUT
There is another with same part number A60-6C and this picture (below) is from Standard Motor Product's website, so I'm guessing they changed the part not long ago:
I don't like the idea of crimping the high amperage wire like that. I might remove the white (or black) single wire disconnect wire and solder in a loop connector and use a junction block (or something) on both ends, first.
@wolfmandip if a person "can" get a hold of the top picture (with white or black single connector) - then a person can use a bit of electrical tape and make it look close to original. Below is a reproduction '68-70 B-body 383/440 starter cable:
First of all, depending on the 2-wire starter connector - sometimes there is enough flexibility in the connector to work with the '88 and newer starters. Sometimes you will need to make a small cut on starter end of connector to spread the wires apart. Sometimes, you just gotta have to cut the two wires apart. If you did cut the two wires apart, it is just a bit more work to get the nuts tight. I've done enough mini starter exchanges and it has gone all 3 ways (no modification - but you have to struggle a bit, a small cut or a complete cut).
Now, if you are replacing the bigger of the two wires (ie: using the Standard A60-6C part) - all you will need to do is strip off the tape from old battery cable - then take the brown wire from old wiring. Then tape the brown wire to the new starter cable using the old tape as an example. I marked it with orange circles on the above harness - but that is not correct for FMJ. The brown wire goes to the starter relay, which is on the firewall by the brake booster.
Note: Chrysler used a cloth based tape for harnesses. Most electrical tape you will find is plastic based.
This particular cable is 60 inches long and 6 gauge wire (part of the A60-6C designation).
If I was to create a new cable - which I will be doing as part of my big block conversion, is getting a larger gauge wire for starter, like this one:
That is 60 inches long, get the brown wire for starter solenoid, then run a third wire, like this one:
- to piggyback off of the starter, then tape the three wires up (as shown). Then use some kind of junction block, like this (in place of the white or black single high amperage connector):
Now, if we can find a sizeable number of the top starter cable, then count me in - I want to get a couple. The lower starter cable, I'm not sure I want to work with.
BudW