Re: Sex toys
I know this is going to sound kinda out there, but have you thought about trying urethral stimulation? Perhaps tie your hubby up and blindfold him, and insert a urethral sound/dilator into his penis?
For several years, my wife would participate in urethral play with me using a surgical quality urethral sound. We worked up to the point where she would insert the sound far enough into my erect penis to stimulate my prostate which was absolutely sublime. About a year ago, she told me she didn't want to do this with me anymore, she claimed that she was afraid of hurting me. I still do it by myself with her blessing, but it would totally blow my mind if she would do this with me again.
Again, this isn't for everyone, but perhaps your husband (and you) would enjoy this type of activity. Worth a try I would think.