I guess pretty much all manufacturers have their own idea of a good bracket, so universal brackets would be difficult to make. You just may have to be creative. Tape makes it a hassle to remove and re-attach the lights. How about zip ties, rubberbands or hose clamps?
To err is human. To moo is bovine.
Who is this General Failure anyway, and why is he reading my drive?
Public D8, Yuba Mundo (cargo), Novara Buzz (1-speed, soon to be 2-speed w/ a kickback hub), Xootr 1-speed folder
I bought some heavy-duty velcro with adhesive backing and put one strip on each light and another (making sure it was the corresponding texture) on the handlebars of all my bikes. It makes switching easy and the grip has been reliable and strong.
I just spent a Sunday afternoon in the shed, creating the ultimate bike lamp mounting. It started as a crash-damaged crank, but after a bit of hack-sawing, filing and drilling, it is now a fork-mounting block with a pivot point for a section of chainring with a lamp on the end.
If I can hold of a digicam, I'll send a pic, and one of the remains of the crank.