Marc Miller shared a set of Sketchup models he had designed for Adafruit RGB LED strips — looks to be helpful. While these are generated from the available datasheets and not from the actual strips, you will want to check the these models against your strips when you receive them.
Even so, Marc’s work will be super handy after you make a few slight revisions!
I made some Sketchup models of the digital RGB LED strips. One for the LPD8806 x 32 and one for the x 48 LED / meter version. Since I don’t actually have a x48 version (yet!) I re-purposed my x32 model so the solder pads are visually less accurate from the real thing, but dimension wise for length and LED placement it should be pretty close.
Good for checking spacing and working out layouts when integrating these into a design if you use Sketchup. Huzzah!