Making a bridge for the electric violin is a LOT easier than one made for an acoustic since the EV is usually flat in that area. Adding a piezo pickup to the bridge isn't such a good idea as if you have to replace the bridge for any reason, the cost is more as the pickup is usually not able to be used again as you probably would epoxy it into a hole in the bridge.

I personally like the flat piezo pickup strips like this one on e-bay for holding the bridge. This $15.00 kit comes with a pickup, pre-amp and a knob, etc.

http://www.ebay.com/itm/Electr.....20ece8f168

Here's a my pdf you can download and/or read for making a backup bridge for an acoustic.

https://fiddlerman.com/forum/t.....ridge-pdf/

If you want to hold the bridge perfectly square then this little tool is very handy.

http://www.ebay.com/itm/Violin.....#038;rt=nc

I prefer to use a blank because you can buy a very high quality maple blank from a reputable dealer for $10 and they are perfect. All you have to do is reduce the height for your strings on your violin and sand the feet flat.

You can see in this pic of my 5 string how that bridge will fit "inside" the pickup.

Just make sure you maintain the lettering side of the bridge vertical when you sand the feet flat. The front is the only part sloped. and on my electric I reduced the width of the shoulder (the part the strings touch) to 1.0 to 1.5mm