Recreating missing pattern pieces?

I bought this cute dress from a salvation army store a few weeks ago, only to find when I got home that only the collar pieces were in the packet (I swear when I checked in the store they were all there!).

I've got patterns I can easily borrow from to put the dress together, and it's a pretty simple dress to draft, but I started thinking that it might be possible to recreate a missing pattern piece from the instruction and layout images. Has anyone tried this?







I'm going to experiment with this pattern and scale up the instruction images rather than just drafting from scratch, but I'd really appreciate any hints or tips you have as I have a few patterns with one or two missing pieces. Drop me a note on my blog if you've got suggestions!