Never liked the idea of using bulldog clips for holding my heated bed, I'm losing like 10-15mm print area because of them, and after I added a fan shroud, I've had a few times the duct ends got cought in the clips while printing the first layer and was close to a disaster. The one's I saw around here didn't fit my bed, cause my glass is longer on one side (200mm x 214mm), so I made these.
Update 1(8/14/16): The ones I originally uploaded came out a bit to small on the sides and the glass moves around a bit. I remade them in SCAD so you can customize it to fit your bed. Just run the Customizer App and play around with the settings until you get it to fit and hold your bed down tight.
Update 2(8/14/16): I took out the STL since the default settings in Customizer will generate the exact thing I uploaded in the STL and it might not fit your bed and I don't want you to print something that does not work quite well :)
Print slow and not too hot or you'll get some deformation.
Designed it using Autodesk Fusion 360.
Then remade in OpenSCAD to use with the Customizer App.