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If all 100 are like your example, eg. different /folder/ structure and different page name then unfortunately there's probably not an easy/automated way to generate the list of 301s. Having said that, if there's any patterns for the URLs you could try a rule geneator tool like this one: http://seo-website-designer.com/HtAccess-301-Redirect-Generator

What's causing the blog posts to rank above the product pages? Better information? More in-depth photos? Reviews? More content in general? If it's any of these, then think about you can apply these positives to the product pages so people start sharing and linking to those more.

Would handpicking the best links and contacting the sites to ask them to switch their links to your new website be an option? That way you can be more confident of not damaging the new site whilst trying to retain the best of the old sites backlink profile.

Hi Novos Jay,

Do the shady backlinks you mentioned still exist and point to the site?
Have you used the disavow tool at all?

The reason I ask is that it might just simply be down to the fact that the links that were holding the rankings and traffic up previously, are now gradually being devalued through various algorithm updates, so in spite of your recent work to do the right thing, there's still going to be an overall negative effect.

Perhaps with a little more information about the types of links (the shady ones) and quantity/% of the total backlinks, I/others might be able to give you some more specific ideas on what's happened?

Thanks,
Greg