At the moment I'm dealing with one problem. I'm overhauling products in my Magento 1 store and would like to create redirects to keep customers in my store without annoying 'page not found' errors. Can anybody suggest the extension that will do this for me?
so, you'd like to set up 301/ 302 redirects for your old product pages, right? In this case you may consider SEO Suite Ultimate extension for Magento:
The extension will let you create these types of redirects for your old product pages and thus avoid 'page not found' errors.
Also, with the extension you can specify the time period to keep redirects on your site, manage all deleted product redirects and more.