I've visited Holy Trinity once, about 2 and a half years ago. It's a beautiful church. I hope it stays open.
We order them from The Seraphim Company, Dept I, P.O. Box 26600 Colorado Springs, CO 80936-6600. They are $8.00 each for individual orders, but the cost goes down if you buy in bulk. We get 200 in an order, and the cost is $4.00 each.
Hey, if we stay open, and you happen to be in the area from late October to mid-December (when we usually run out), we'll save you a copy! We only charge $6.00, so it saves you a couple and makes a little bit of money for the parish, too.