BuyDig has the Aeon Labs Home Energy Meter - DSB09104 for $18.49 after coupon code zwave5 with free shipping. This code appears to work on other Aeon products as well. Such as the Minimote.
I believe this may be the older battery operated version. They accept Paypal so no worries about CC info.
This is the original Home Energy Meter(DSB09104-ZWUS) This is the U.S. frequency device, so it will not work with European Z-Wave systems.
The new version Aeon Labs Aeotec Z-Wave Home Energy Meter, 2nd Edition (DSB28-ZWUS) has a different part number and a different appearance. Notice the extra cable. For Europe, you’ll want DSB28-ZWEU, see Vesternet.com.