I'm also looking for something like this. Actually two different items:

1) A red and white "first aid cross" sticker to go on my first aid boxes. Preferably reflective. Glow in the dark AND reflective for extra credit.

I looked at LSS and couldn't find the decals you referred to.

Found one.

2) A sew on "first aid cross" patch to go on the outside of my bag pocket that contains the first aid kit. Perhaps red cross on black background, but less picky here.

So far, this is the only one I've found.
Oops. One more.

Any pointers would be appreciated.

Thanks,

-john