Anderson spring replacement hardware as seen on you tube video

So I understand what I need to do with my Anderson window spring cords not working properly. My question is can you tell what spring I need if I supply you with the Window # from my original invoice. Otherwise from what I saw. I will first need to disassemble the window to see the old hardware, then call you to have them shipped. Meanwhile I either have to leave the window open or put it back together and do it again when the new parts come. I hope to avoid this. Here is the Anderson Double Hung Window number #30-5052-20 Dimensions 9'3 5/8" x 5'6 1/4" .These are two sets since these are the small side windows part of a bay window unit. The other window is a Double Hung Casement #3452 3'5/8"x5'5 1/4". Any help will be appreciated.