No. The current Skywriter/E2X can has wedge shaped airfoil. The classic fin can has a diamond profile airfoil. Also, the leading edge is already swept a little too much, iirc. I'm at work and can't eyeball them. It's hard to tell in the pics.

That said, if you want stand off scale, you can get pretty close. If you just stuff a Skywriter fin can on a Challenger 1, all us old folks will immediately notice even from a distance. Put a little forward sweep on the trailing edge and it will start fooling the ones who's eyesight isn't what it used to be.

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