Have you tried Simon's Hardware? It's on 29th and Third, I believe. They have always had a really good selection but I haven't been there in a long time. Also, what about Home Depot or Gracious Home? In my last bathrooms, I had handshowers without the slide bars. I think they were Grohe. They were nice but what's out there now is even nicer.

You need/want one that attaches to a regular shower arm.

Something like any of these in this search.

(I used this company just because, but this is what you are looking for, I believe)

Here is a link that might be useful: handshower shower arm search

Have you looked at this 2 in 1 by Delta?

http://ahelicoptermom.com/delta-in2ition-two-in-one-shower-hand-held-shower

It looks like it would take care of what you need perfectly.