Haven't heard how you made out with the stuck clutch, so here's another option for you (I like Materman's screwdriver method if access isn't too difficult). Another thing you could try if you can find a lonely road is similar to MtneerMike's method. Instead of using the brakes though, once you are moving along in first or second gear, depress the clutch and then fairly aggressively accelerate and decelerate a few times in rapid succession. You can repeat this several times if you need to. This has worked well for me on the several times I've had customer vehicles with this same problem, and no harm done.
