You might try Joe's Racing Products. They aren't exactly the same style, but they are anodized aluminum and come in 3 lengths (5, 6, and 8 inches) for about $25.00. The ends swivel, and they have left and right threads so the length can be adjusted in place. I'm using them on my front splitter. They also have some pretty trick adjustable fender braces, NASCAR style hood supports, mirror brackets, etc. Try
www.joesracing.com.
Pappy