to convert to QR all that is needed is a hollow axel to run the skewer through. Just take the cones, spacers lockrings off the old (solid) axel, assemble them back on the new (hollow) axel and put a skewer through the new axel to tighten to frame/forks. You will need a bike shop to supply the new axle, so get them to show you how to do this job yourself. If they are any sort of shop they will only charge you for the axel as the time it takes for labour would be no more than 10 minutes.