Okay.
So I was visiting some old friends in Berkeley, CA, and since we had time to kill before my flight departed, we hit some thrift stores in search of: A tie, a camel-hair coat, a brown-pinstripes dress shirt TO MATCH a pair of dress pants I had in Oregon, and props. Specifically, a sonic screwdriver prop. I didn't expect to find anything, but I went along with them because I didn't have anything else better to do.
HOLY.
SNAP.
I found: Almost the exact tie I was looking for, the most gorgeous coat (it comes down nearly to my ankles, and billows impressively to boot!), and a dress shirt with slightly brighter colors than the dress pants. No sonic screwdriver, but ThinkGeek will save the day.
All in all, the entire Kumoricon experience (sans booth expenses, as those can't really be predicted,) will cost me about 63 dollars. Forty for pre-registration, fifteen for the screwdriver, eight for the dress pants and white dress shirt (purchased in Oregon) and three for the tie and coat (purchased in California.) The tie, which is exactly what I was looking for, and the ankle-length camel-hair coat which there is absolutely nothing wrong with. Three dollars.