VEVOR Cable Railing Post Level Deck Stair Post 106.7 x 2.5 x 5 cm Cable Handrail Post Stainless Steel Brushed Finishing Deck Railing Pre-Drilled Pickets with Mounting Bracket LGZH106.72.55CQ93V0
You can use the one without holes. You need to drill the hole by yourself.
https://www.vevor.com/products/vevor-cable-railingpost-deck-railing-42x1x2-diy-post-without-holes-black?_pos=1&_sid=e0dd028be&_ss=r