thanks for all the replies

looks I'll buy these as they are available indeed locally at ACE, though the local
stores initially wanted $10 per spring extra, online price 49.99

PRIME-LINE PRODUCTS/SLIDE-CO GD12231 SPRING TORSION 32" LEFT WIND WHITE

PRIME-LINE PRODUCTS/SLIDE-CO GD12230 SPRING TORSION 32" RIGHT WIND WHITE

https://www.acehardwareoutlet.com/(4...px?SKU=5064001

https://www.acehardwareoutlet.com/(4...px?SKU=5064068

49.99 each (left/right)