Hi Ferchup,
I didn’t come with a solution as I had planned, but there’s a workaround which is good as well. This works with an extra sidebar plugin. So for each different page in the shop where I want a different sidebar with text, a new sidebar is created. After that I just add a unique text widget with a SEO text.
The plugins I use are:
– Content Aware sidebars http://www.intox.dk/en/plugin/content-aware-sidebars-en/
– Woocommerce products filter http://www.woocommerce-filter.com
You can have a look at how this looks at: http://bit.ly/1LxXs0r
Hope this works for you.
Cheers!