This is not medical advice, but just some information from one who has had prostate removal surgery and am now rehabilitating penis function and restoration. I would suggest considering getting a penis pump and beginning a course of therepy to rejuvenate and stretch the penis, just as we post-surgery guys do now. A cheaper, but effective pump would begin the process of restoring, MAYBE, it shouldn't hurt to try. Don't get suckered in with the sex ads that promise massive improvement and such by using their pump, though. A good cheap medical grade pump, with a safety valve release feature to avoid over-vacuuming is what you need, if you decide to try this.
Maybe something like this:
4/19/07 PSA 7.6, referred to Urologist, recheck 6.7
7/11/07 Biopsy- 16 core samples, size of gland around 76 cc. Staging pT2c
7/17/07 Path report: 3 of 16 PCa, 5% involved, left lobe , GS 3/3:6.
9/24/07 (Open) Retropubic Radical Prostatectomy performed
9/26/07 Post-op Path Report: GS 3+3=6 Staging pT2c, 110gms, margins clear
10/15/07 ED- begin 50mg Viagra and Vacurect pump nightly, Fully continent
1/14/08 Caverject started/stopped, aching. 2/24/08 .5ml Bimix started-success
3/24/08 ED- 6 mts.-Viagra, pump, no response- Bimix continues
Post-surgery PSA's: 3 mt:0, 6 mt:0,