Finding a good lawyer can be hard, but a good lawyer won't object to reviewing docs you got online. Lawyers review contracts written by other people all the time. If your lawyer won't review a well-written document because of its origin, replace the lawyer, not the documents.

This isn't the same as a lawyer saying, "I've read through it, and we can go line-by-line to find all the issues, but you're better off starting from scratch," but based on what I've seen, the Clerky docs are a lot better than that.