costs really shouldn;t be the deciding factor, as how much do you think it will cost if you have an accident, and shooting something you didn;'t wish to, from living things to not!
a unsafe X bow is a dangerous item, that needs fixing and stop using till its fixed!
and I for sure would contact the OEM, and see what they say, odds are high they might fix for you for free?
as if its a design flaw, they could be in for a law suit! so, fixing your bow would be tons cheaper than letting it go as is!