I am so sorry that you and your husband are facing this. It is, however, very good that he is able to face reality...which could very well save his life.
Please don't feel "abandoned" by the original urologist. I wish that more doctors who are not up to doing major procedures, either due to age or health, would admit it. You and your husband want the very best and your doctors are doing everything they can to assure that he gets it. A few week's delay will not make any difference in the outcome; although you do want to get it out of there ASAP, it has been growing there for a long time already.
One of our members, Alan, has "bookmarked" a page from the Cleveland Clinic's web site that gives a very good description of the procedure and the types of diversions available.
my.clevelandclinic.org/health/treatments_and_procedures/hic_Urinary_Reconstruction_and_Diversion
Your husband will want to discuss this very carefully with the surgeon. In addition, there may be surgical complications due to his previous radiation treatments which might limit his choice of options.. This will also need to be discussed.
If you feel that you need additional advice, Memorial Sloan Kettering in NYC and Johns Hopkins in Baltimore are also excellent places for a second opinion.
This is not easy surgery, but with you by his side and his "go for it" attitude, your husband should do very well.
Wishing you the best of luck
Sara Anne
Wishing