Welcome to APUG Jennifer. I took a look at your site and I love your work.
I can't say for sure that they have it in stock, but profilm.com has Optima 200 in 120 listed on their site. Here is the page: http://www.profilm.com/ViewProduct.aspx?id=100166. I have purchased from them many times and never had any problems.
Not sure that the 200 speed works for you, but I thought you might like to know.