snapped bleeder nipple

[dwest]

89 300CE 175K
Just set out to change out brake fluid with miti-vac. I think I know what I am doing but encountered a broken off bleeder nipple on front left caliper.

I don't have tools to drill out the stub or a replacement nipple. I've done the rears, put the wheels back on, jacked up the front, put it on jack stands (a driveway job) and there I am.

Any advice on clearing the caliper with the busted nipple? Should I just replace as much fluid as I can and worry about the front left later?

Thanks