I saw a few posts with a link to the struts needed to handle the extra weight of traction boards mounted on the panel, and at $17.99 per strut, I decided to look on Amazon and found these at $20 for the pair. They work great and seem to be of good quality.
https://www.amazon.com/dp/B0BBMJ3NNT?ref=ppx_yo2ov_dt_b_product_details&th=1