Not an A body but still a Mopar

So.... the cable insert broke and not the housing?? If it is the innerds I had the same thing happen on my 53 years ago and I bought a universal insert at Big "A" or NAPA (can't remember which) that I cut to length. Just be sure your cable housing isn't damaged or kinked and clean/flush the interior as best you can. You may already know but these will fail due to moisture getting in the innerds and rusting the core to the housing so look for the source of the moisture. Be careful when you cut the insert as the want to fray. I believe I cut mine with a heavy tin snip and then cleaned up the end with a bench grinder.