Per Andrew's request, I am sharing this upgrade I found on Hackaday.com.
A few months back, a gentleman posted that he was looking to create a 110/230v heated bed. At that time, I told him I would be interested in beta testing it. A few weeks ago, he contacted me and told me there was a small batch ready. It was not free, but only ended up costing around $50-$60.
It has the exact same footprint as the stock one we are currently using, but does not include the attached aluminum plate. It is basically a circuit board, so you would need to add a metal plate, or do like I do and use a thin piece of plate glass. There is no way to print to it directly. Additionally, you will need a relay to control the power to the bed, since it runs off of mains voltage.
The awesome part of this setup is the heat up times. On the stock bed we've been using, it normally takes me about 7 minutes or so to get to 60C, and it took me 30 minutes to get to a max temperature of 93C. Printing ABS really should be done at 100C or higher. This particular bed heats to 60C in about 10-15 seconds, and 30-45 seconds for 105C! I can now turn on the extruder and heated bed at the same time, and be ready to print in about a minute! I think he still has some available, and the link can be found HERE. Hope this helps someone!
Also it seems you can now order it with a solid state relay, for 40 euros that's really not a bad deal at all! Although it does say that this is still the Beta run and this is half price compared to normal production, so if you're interested you should buy one asap!
I am beta testing this right now off the printer to see how it performs. It definitively heats fast; which leads to temperature swings as the controller turns the bed on and off. Of course since we are printing on glass or another surface such as zebra plate the fluctuation is not a really much of a concern.
The glass took 3 or 4 minutes to get to 60 degrees C, the Zebra plate took much longer due to its thickness. The glass can vary in temperature by about 3 degrees below the set temperature, the glass never overshot the temperature setting even though the bed does by like 6 degrees.
Update: On the plus side for Zebra plate for PLA you don't need a headed bed as long as your room temperature is comfortable. Also you can remove the print from the plate off of the printer so you don't get your bed out of alignment removing stubborn prints.