Anyone live in Denver and play a bow/string instrument know where to get rosin? [View All]

[originalpckelly]

I'm experimenting with a technique called col legno tratto, which is drawing wood across the strings of an instrument instead of the horse hairs. Instead of using a real bow or a normal string instrument I'm using an electric guitar, but the wood alone (which I filled in a wooden dowel for) doesn't produce enough friction to make a sound without being amplified to the nines.

Where do I buy rosin in Denver CO? Is it relatively cheap, like a couple bucks? Online it is, but I'd have to wait for it, and I'm working on a song with it, so I'd really like to have it today. I don't know where to go.