If you're looking for something to just do the job you can do something as simple as drawing one on a piece of paper, or, what I've done in the past, take two coins and melt them together, use a pin and you can carve into the coins. I've used that one specifically to bring money in, for security in protection, and I'm sure it can be made to help with healing.
The other poster was right, drawing your amulet could work just fine. If you wanted to get a little more effort intensive you might consider drawing it out on a piece of cloth and then embroidering it. That would make it more durable and you could use thread that's color corresponded with the magic you wanted to use it for, or since you wanted to use it for healing just a color that is comfortable to you.