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I have used JIMS cam bearing tool. It is solid and does the job. As far as a particular place to get it, www.jimsusa.com. I am sure others sell them as well.
Gary Beatty makes and sells an inner cam bearing remover/installer combo tool for $85 plus shipping. That tool works slick. Then get the crank lock tool on ebay. Total cost for all is less than $150. Gary's email is beattygw@sbcglobal.net