MIDI thru to another keyboard

Hey, guys!
I was thinking - I'm planning to purchase a new keyboard soon for my studio, but a lot of models these days have all but done away with standard 5-pin MIDI ins and outs.
Leads me to my question - if I want to use a piano with no MIDI output (besides USB), but I want to daisy-chain it to another keyboard to use that keyboard's sounds for live performance, is there are way to do this?
I can't imagine that there's any  sorta "USB to MIDI" cable out there, obviously. But I don't want to have to run the whole system through a computer and deal with latency and all *just* for the sake of using a rhodes sound instead of grand piano.
 
Thanks!

There are MIDI USB to 5 pin DIN convertors, but they are a bit pricey. Google Kenton D-Sync. If you are running a computer and a MIDI interface or Audio Interface with 5 pin DIN in the setup, there several ways to echo MIDI coming in by USB to the out via DIN.  

Thanks for the replies so far, guys. Reading the responses, I realized I might not've been so clear as to what I'm looking for;
 
A way to run a USB-ONLY keyboard into a keyboard with ONLY 5-pin midi inputs and outputs, without the use of a computer. In the same way you'd connect a MIDI keyboard-out into the MIDI input of a keyboardless synth, but with a USB-B "printer cable" instead of a 5-pin MIDI connecter.
 
The more I think about it... the more it sounds like a pipe-dream!
 
Then again perhaps I didn't quite understand some of the solutions - correct me if I'm wrong :)

M-Audio Keystation 61 61-Key USB MIDI Keyboard Controller MKII  US $135.00
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KEY FEATURES
61 full-size velocity-sensitive keys with natural piano feel
USB-MIDI connection for playing virtual instruments, controlling recording software, and more
5-Pin MIDI Output to trigger external MIDI devices
Transport and directional buttons let you operate your DAW from the keyboard
Pitch bend, modulation, and octave controls for expressive performances
USB-powered and supports plug-and-play connectivity to your Mac or PC
Lightweight design for easy setup and portability
iOS compatibility using the Apple iPad Camera Connection Kit (sold separately)
Includes Ableton Live Lite, a powerful music performance and creation software
Includes SONiVOX Eighty-Eight Ensemble, a virtual piano instrument that captures a 9-foot CD327 Steinway piano
Includes AIR Music Tech Xpand!2, a multitimbral all-in-one workstation

Kenton Electronics MIDI USB Host INTERFACE - NEW  $99.00
http://www.ebay.com/itm/K...c7a:g:wN0AAOSw44BYlMDO