You could try the
Pulse by Hot Octopus. I don't own one of these, but I've heard good things about them.
As far as vibrators go, the
We-Vibe 4 is quite good. However, I'm not sure how sensitive your partner is, and it's still largely focused on the female end of things. Still a great couples vibrator, though it's one of those things that either works for you or doesn't.
One of my favourite cock rings is the
Oxballs Cocksling 2. I HATE their advertising and the thing looks kinda stupid, but it's easily one of the comfiest ones I've ever used. They feel really great, and they're designed so they don't constrict you too much when you cum, which is a nice feature. Again, it's very comfortable and easy to wear, so he might like one of these more than a conventional cock ring.
You could also try a
Cobra Libre, but they seem more geared for solo play rather than couples...
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