<ul><li><a href="http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=40732">Harbor Freight Rear Caliper Tool</a></li></ul>

I got a generic tool at my FLAPS (Pep Boys I think it was) for like $8 or so. They had no idea what I was talking about until I told them that it was used on most Nissan cars.

it on sale for $20 but I haven't seen it on sale lately.