Most of the materials, that I use in my craftwork, come in relatevly raw from - veg-tanned leather, solid brass rods, nuts and bolts, sheet brass. All this stuff it's not very hard to come by. If you don't have any leather and metal suppliers in your town, you can easily order raw materials online - all is available at Etsy, Ebay and Amazon, as far as I know.
Regarding Last Exile series... Well, believe it or not, but my fascination by LE universe was the main reason for me, getting into dieselpunk/steampunk crafing.
Long story short - I run a very long (7 years, for the current moment) D&D "ruler" session based on LE universe, created a full scale fluff. Was so much into it, that started to make materials items influenced by the LE universe, mainly because I can'r draw or write. Soon after, making dieselpunk accessories turned into my main source of profit....
So, I guess you can say that I'm pretty much indebted to Last Exile series. Now, I wonder, what character from LE, you think that I resemble?