Many people have replaced the lower hinge pillars as they are available from most major parts suppliers. I've seen that done and it was not that bad. If you plan on replacing the whole pillar, you will probably need to find a donor car and it will be a bit more labor intensive. If you are wanting to replace the hinge pillars on your '67, let me know. I have a donor section you can have.
Here is the section I have listed on the Samba for free.
If it will work for you just shoot me an e-mail and we can set up the details. If you need anything else for your '67, let me know and I will see what I have or come take a look.