I made one, it is specific to bows of my specs though. What I did was take the dimensions of the kind I would need and built it. Mine is not only functional but beautiful. Made out of some native 60 year old 5/4 cherry and some common red 5/4 oak. I work with wood so I know how to make stong joints. I tried it out without any sturts to keep the limbs together and they almost held. They didn't seperate but didn't sound like they were giving so I backed it off and added some 1/4 threaded rods for strength at the top of the limbs. I used eye bolts, turn buckles, u bolts, 1' pvc pipe and some 3/4 bolts. It works well for what I do, but could beeasier to operate. After the bow is turned down in weight and installed I simply turn the buckles untill the string is relaxed. cost me around twenty bucks. You can buy parts used for presses if you care too, but that increases the cost to a point where you might as well buy one. The cheery's grain is like summer wheat in the wind. As you move, it seems to shift.It's not hard to figure out and people have been pulling things since the dawn of time,and you already have the specs. Took me a couple hours to build and a trip to a farm supply store.