Hi Amanda,
First of all, thank you for a great contribution, and all the support you've provided which has enabled me to get it working well.
There is one part which I haven't been able to get to work though, and I wonder if you can help me? If one of the products in the 2gether offer has a stock level of 0, then I don't want the 2gether offer to show for that product. I added the code below as suggested, but the offer still shows on product_info.php:
I have osC set up so that products are still visible even if the stock is 0, so they're not marked as out of stock, if that's of any help.
Thanks!