As it turns out, the pin mapping is almost 1:1 between the stock LCD board and those cheap LCD modules. The only thing different between the two is the polarity of the backlight LED. With a little creativity, you can add some bodge wires into the new module and get the backlight working no problem.
![Image](http://i.imgur.com/4j4PD41.png)
eBay LCD pinout.
![Image](http://i.imgur.com/3tuP0Je.png)
RCH3000 LCD Pinout
Personally I think white text on blue looks nice and sharp, but the choices for colors are as wide as what you can get your hands on. It seems like almost all the LCD modules on ebay have the same pinout. Just make sure that you check the polarity.
![Image](http://i.imgur.com/5s3WdOTl.jpg)
![Image](http://i.imgur.com/dquOgzFm.jpg)
![Image](http://i.imgur.com/rAFTRF8m.jpg)
![Image](http://i.imgur.com/lIEvwoVl.jpg)
Just some more information I figured I'd share. I know there are a few avid users of the RCH3000 and I'm really enjoying finding all the little quirks and surprises in these units.