Turbo help needed

Ok so I noticed the other day that oil was coming out my blow off valve so I my turbo must be leaking. So should I rebuild it and were can I get a kit to do so or can I upgrade to a better one? I would like to upgrade but I can't weld so I would need something that I could just bolt on. Any one know a bolt on upgrade that wouldn't need alot of changes? Thanks for your help.
 
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