Here are some templates for making your own three lug to five lug (3 on 2" to 5 on 4.5") adapter.
Save some cash and show off your metal working skills

These are in PDF format so you will need adobe reader to view these. If you don't have it you can download it for free at Adobe

Here is the template that you use for a blueprint. It is to scale as long as you print it on an 8.5" x 11" piece of paper. (normal sized paper):
Three Lug to Five Lug Template H...