'88 80Q Bleeder Screw Broken

["Michael Theuri" <mikesoft@europa1.conwaycorp.net>]

Finally got the correct master cylinder for my '88 80Q and 
headed straight to my mech along with 2 liters of Super 
Blue ATE. Two hours later I got a call that nothing could 
be done as the bleeder screw on the front left caliper 
driver's side was broken....what a bummer. I was really 
counting on it being fixed today as I will be making a 
800 mile journey today to Indiana. My master cylinder is
not gone yet but the brake lights stay on occasionally, 
a sign that it is on its way out. Mech. says it should be 
okay to drive...pedal does not stay all the way to the flow.
I'd like your opinions and alternatives if anyone has ever 
experienced a broken screw. Thanks in advance

Mike