Step 1: Materials
Now for the fun stuff- for the blasters you'll need some MDF wood, sheet plastic or Sintra (PVC sheet sold by plastic suppliers and sign shops- cost about $35 for a 4x8 ft. sheet 1/8" thick), some wood screws, Bondo, epoxy, PVC cement and a few lengths of PVC pipe.
Step 2: Pulsar Blaster
The slide handle is made from a cut section of PVC pipe with ribs glued on. It has a piece of MDF glued inside it to hold the bearings for the slide. The slide itself is a surplus computer rack part I found at an electronics surplus store- a drawer slide might work as well (or just screw on the handle to the bottom of the blaster if you don't want it to move.)