Fx streamline hammer spring retaining nut stripped out

So from what ive seen and read, the fx streamline hammerspring retaining nut strips out super ez, and sure enough the one on my 2nd hand streamline came stripped out, this piece seems way way under manufactured and super thin and cheap, called a Fx distributor for the part and was blown away by how much they are asking!!!!! 20 dollars a piece plus shipping yea WHAT!!!!! so not only is the part super cheaply made its way over priced. What are your thoughts? Have u had this problom? Are there any Machinist who can make a stronger one for less money?