Other than the placement of a stent, I am not aware of other treatments for the scar tissue, other than the laser removal or botox injections. You may want to obtain another urological opinion in a major academic medical center.
Another option would be placement of a suprapubic catheter - which is a permanent catheter placed via the abdomen. You may want to discuss this option with your personal physician.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
Medical Weblog:
kevinmd_b