Hi FiftyMan,
I can relate to your situation 100%. I am 53 with ED. Started a few years ago for unknown reasons. I do take several depression/bipolar meds and they are likely the cause, and also added a high blood pressure med which was the final blow. I too offered my wife to take a love and she denied and is sticking by my side and is very supportive.
You mention surgery which I have not looked into yet. Can you share what you know about the process, expense, and what they actually do? Have you tried penis pumps? I'm thinking about buying one but I'm not sure if it'll do anything for me.
Hang in there friend...we have loving wives and will get through this somehow. I feel like much less of a man although I have a huge sex drive like you. I give her oral but it's just not the same (from my perspective).