Jon, I love that idea, because I have a few hard cases, a car, and some cats that those could go on. But, some people would probably end up using them for forgeries to be sold on eBay, because that's what happened previously. I don't know if you've seen threads where that issue was raised, but I think Alembic once sold pendants of their sigil, but the jewelry ended up on the headstocks of fakes which were being advertised as real Alembics. I could be totally wrong about this, but I also believe there is now a standing implicit request that lone sigils for sale be brought to Alembic's attention.
But, merch is always cool.