Looking at the pictures (late, late late- why am I here so infrequently?), and from the pure academic place of having not had the pen or even model in hand, I'd say the best course is to haul out the original pressure bar and replace it with a short replacement. The ones I get have the secondary presser mentioned above already attached, so the only bodging required is making sure of the length... unless the pressure bar is connected to the barrel in an unusually firm way, like the early Sheaffers were.
Actually, that's the second best course; before that, I'd contact C-S and see what they say. This may be something under the same sort of policy as an automotive recall, something so embarrassing to have floating around they'll fix it even if you're not the original owner. The worst that can happen is they quote a vast amount to put it right and you say "no".
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