I suppose you mean you loose only that one function relative to the original Kenwood, not Rio remote, right?

No, relative to the Rio remote. There is no button on the (what was it, something like RC-600 I think) remote that cycles through the info modes like the Rio remote does.

I got mine from Crutchfield for less than $30, if I recall correctly, but they no longer list it for sale. Not sure where you'd go to find one now. But there is a lot more information about it in this thread.

tanstaafl.