ATTN: This page currently doesn't work, and it might be a while until I fix it. If you'd like the code, get in touch and I'd be happy to send it to you or create a public repository.
print a key
go here and follow the instructions
enter your key type and bitting:
download your 3d print file (it may take a second to generate)
Disclaimer: I've never actually tried a key made using this yet, so I hope it works. It also keeps breaking, so keep that in mind. This tool uses code written by Nirav Patel.