Have a look at the prototype of Dynawa TCH1.
We are now working on manufacturing the first batch of TCH1 housings (later on, these will be customizable). Their design will actually allow you to choose which way you want to wear them - whether you prefer 2 buttons on the right and 3 on the left or vice-versa - they can be rotated 180 degrees because - apart from buttons - they are symmetrical.
Watch this blog to see the latest Dynawa developments and have a look at the FAQs.
You can also join out brand new mailing list (here is the web interface for list archive).