Is this possible?

Ok, thank you all for your input.
The carpet is dry, the outside of the MC is dry and the pedal does creep down when pressure is held on.
It appears to be the original MC/booster (part of the MOPAR decal is still there) I will be replacing the whole unit.
If/when this does the trick, it'll be much cheaper than the ring job I was told it needed.
I'll be sure to keep you all posted on the results.

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Now all we need is some GLOBAL WARMING! Would somebody PLEASE call Canadia and tell them they can have their F@%#ING AIR BACK!