Print two half-sized copies of a two-sided document at once

I have a two-sided, us-letter format document that I'd like to print two copies at once, by resizing it to half letter (a.k.a. [statement, or organizer L](https://en.wikipedia.org/wiki/Paper_size#Half_letter)) . My current workflow is very inconvenient: - The original document is two-sided, A, B, C, etc. - Using PDFSam's [mix-pdf](https://pdfsam.org/mix-pdf/) , duplicate each page (so that the document is A, A, B, B, C, C, …), - Using pdfjam, resize the document and have two pages by page (so that I have A A on the same page, on landscape mode, one of top of the other, etc.), - Print using lp -o sides=two-sided-long-edge. I am sure there is a simpler way to achieve this, but couldn't find it. An additional hurdle of my current way of doing is that pdfjam introduces extra margin, that I have to remove using trim.