No fast way to get LC, PERM is not available now.
Just if your company applied one LC three years ago for your coworker. this LC was approved now but your coworker do not use it, (such as he/she got I485 approved though spouse application). you can use your coworker's LC at once if your background meet the requirment at the time he/she applied LC.
LC is applied by company, it can be used by other employee.
Of course, Such thing only happens on big company.