Metal hooks of some sort or wire?
The SEOS Waveguide Project
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I had a stuck driver and a metal hook wouldn't pull it out. I actually did some small damage to the enclosure from pulling so hard that the pick slipped from the hole. Luckily the terminal plate was right behind the driver so I put the screws back in just enough and pushed a piece of wood through the terminal plate. Budged it enough that the metal pick was able to pull it out.
DIY Sound Group: Information and Tips
Blasting brown notes for 10 years and counting!
Is there no terminal in the enclosure? Sometimes it is possible, after removing the terminal, to push directly the magnet of the driver.