I ran across a blog today that had lots of patterns (some appear to be from books and not by the blogger)
There were two that stood out of being interesting to the steam punk community.
First up is a
"vest styled" belt. patterned off of a Forever 21 design and on a grid, if you need a larger size, adding to the center back should make it bigger for you.
Second is
Double Breasted vest patterned after a Moloh design. This is drafting instructions, so some math is required. I do wonder if the finished product will resemble the Moloh vest well though.