It turns out Interslice actually sells seals for the Autocord; they just aren't listed on ebay yet. I sent him a message and he gave me instructions on ordering them.

Here are a few shots from the post-light seal. I'm not 100% sure the leak is resolved - a 100 speed roll prior didn't show it while a 400 speed color roll did - but I'm optimistic. I shot this on an EV 15 day with Fomapan 400:

I probably won't use the film again due to scratches (I've had scratches straight out of development with the film in 3 different cameras now) but I'm definitely happy so far with the shots.