Check out the "How To" forum here on RRB. There is a whole section on homemade truss rods and brackets. I've used angle iron from an old bed frame to build the brackets. Careful grinding will give you a nice curvey bracket. I bought mild steel rods at the hardware store and bent them into the curves I needed. I bought an inexpensive Chinese tap and die set and threadrd the curved ends for chrome acorn nuts I got at the hardware store. I used 2 car batteries, jumper cables and vice grips to hold 6011 electrodes and to secure the two batteries together with Romex. I cut a slot in the bottom of the mild steel rod and used the two batteries and 6011 welding rod to weld an axle washer into the slot. The only big cost is for a welding helmet but maybe you could borrow one.