LRJoe,
I saw those several months back on the forum here somewhere...may have been on the main forum.
I went to lowes and got the stuff and made my own for my little 10ft pelican. used some PVC pipe with a t-on top with bout 1 foot of pipe out each end of the T and then a "U" bolt screwed into the end of each piece. Depending on the height I wanted for my rod tips I bent the U bolts up or down.
Maybe not the best but it worked for what I needed it to and a good little task to do on a rainy day
"The greatest use of life is to spend it for something that will outlast it".
William James