IIRC the Snap On straight edge is (was) in the $75-$100 range though I have heard of a few of these being in the $200 range. I havent looked in a number of years though so things may have changed. Other than the SnapOn straight edge Im not sure what else is out there that is easily available to most guys but a quick internet search will likely turn up something. There is a placed called Goodson products that sells a lot of engine rebuilding specialty equipment that we bought from out the machine shop I worked at and they have just about anything and everything you need for machining so they may be worth checking in to.
