Hi, Alicc - if you search the forum for Gold you'll actually find some. I have two books of Gold Rush songs, but they're both about California gold miners. The better one is Songs of the Gold Rush by Lingenfelter and Dwyer, and I'd be happy to transcribe any song you like. The other is a smaller collection from the Sacramento Bee newspaper, and I think most of the songs are in the Lingenfelter-Dwyer collection. Another good source is Irwin Silber's Songs of the Great American West which is availabe as a Dover paperback reprint. Let me know if you want any songs transcribed from either collection.
-Joe Offer-