tool for body curves

I think something like this is what you are looking for.

http://www.eastwood.com/15in-adjustable-profile-gauge.html

yes that's it! profile gauge. since my body filler skills have not sharpened much in the last 30 odd years! I figure I really need this. it would help me see if i'm close enough or need more work. I realize IF I were a bodyman, I could just run my hand over the curve with eyes closed and know BUT!!!!!!!!!!!!!!.....

thanks for the help. I looked up Eastwood before and could not find this critter!! I knew I had seen it some where years ago! that belvedere's sides curve concave and convex!!!!! and the repop sheet metal for it " lacks" is the polite word!!!!