The part that you reference is a welded steel component, an aligner bracket; it is addressed in Service Letter 596A along with another improvement. There is a "heavy" aligner bracket available on Ebay; I also have one for sale.
I have posted the SL-596A on my website for you. http://www.comanchegear.com/service%20letters.php
Keep your feet off the rudder pedals during gear retraction .
Matt