Looking for 52" upright

I am looking for a 52" upright for a 18 year old 27 ft above groud pool. I puchased it from pool-a-rama and the pool description of it says SKU 8906 27’ 52" L/S 7" Oyster Bay Swimming Pool. The upright carton says SKU 18114.

The steel upright right for a 52" tall Oyster Bay pool is part number 11320.