I also have this tent. To my great embarrassment, I left the poles at a campsite, never to see them again...
I contacted REI, they recommended somebody, they sold me a new set of poles, exact match for about $100 bucks (ouch)
this was probably.....uhmmmm, 8-9yrs ago(?)
my golden rule when breaking camp...'let's look around, make sure we didn't forget anything...like Phil's tent poles, lol"