For the Wanhao Duplicator i3 and various rebrands such as the Monoprice Maker Select, Aldi Cocoon Create, PowerSpec i3, etc.  Will NOT fit the "Plus" variants of those printers as the bearing spacing is different.

I'll be honest.  You most likely do NOT need to replace the carriage plate.  The stock carriage plate, while being a cheap flimsy piece of stamped steel, will do the job just fine if the machine is well aligned.  The carriage plate is likely not your problem - machine alignment is.  But if you're going to replace the carriage plate anyway, you may as well buy this one, cut from 4mm thick carbon fiber.  This plate is packed with features.

• 4-point or 3-point leveling
• Added extra bearing and belt bracket mount holes. This allows use of 3 bearings or 4 bearings, and to orient the 3 point leveling location to either side.
• Slots on rear-center tab to secure heated built plate wires with a zip tie.  Reduces stress on solder points.

I'm not going to delude you into thinking your leveling woes will be a thing of the past if you buy this product.  It may help.  It may not.  If you've put the time and effort into properly aligning the machine (particularly the Y axis rods) and you're still convinced you need to replace the Y axis plate, then I do feel that carbon fiber is the best option.  But before you throw money at your leveling problem, throw some time at it and learn how to properly align the machine.  

This will NOT fit the Di3 Plus as the bearing spacing is different.  

Based on an original design by Steamkraft.  Remixed by me.  If you want to cut or make your own, the files can be found at Thingiverse.  https://www.thingiverse.com/thing:2382638