Strut Braces, again!

[E.K.]

Where can I find strut brace like this

http://i20.ebayimg.com/04/i/000/9a/32/2865_12_sb.JPG
http://i5.ebayimg.com/02/i/000/9a/32/269c_12_sb.JPG
http://i10.ebayimg.com/03/i/000/9a/32/272b_12_sb.JPG

or any other suitable kind?

Thanks in advance.