Is it possible to bring sale unit(or any other field) from item record in templates. I can see examples of item sublist only.

As an alternate, you can use a user event before load event to run on print function. It can fetch the values for you and set it up in the custom field (added via user event) and you can pick your values from that field.

Thanks for this great suggestion, Nick. Does that mean joins on items are not possible ?

I am not sure about that @tuli as I haven't worked with item joins in PDFs.