Quote Originally Posted by Stitches1974 View Post
The only thing you'd need to wait on is the weapon. Everything else you can buy.
Technically you don't have to wait, or rather the requested items can be obtained ahead of time. The weapons are obtained by trading in tokens which means you can collect ten of those in advance along with the Encrypted Tomestone and Carbontwine. I had actually already obtained all the necessary items to get three Ironworks weapons, but it looks like I only needed to get enough for two.