replacement balances needed for unidentified windows

A contractor from Broken Arrow, OK says:
January 27, 2020
UV light has deteriorated several of these to the point where they have crumbled. I am looking to replace everything that is photographed (coils, covers, pieces that the sash fit into-- whatever is shown). I found a sticker on the window containing this info : H-R40-48-72. It lead me to this document...

ANSI/AAMA/NWWDA 101/I.S.2-97
TEST REPORT
Rendered to:
DECEUNINCK NORTH AMERICA, LLC
SERIES/MODEL: 310.300 SH
PRODUCT TYPE: PVC Single Hung

Thank you in advance for your time and consideration.
Thumbnail of the uploaded file named in_place_#1.jpeg
Thumbnail of the uploaded file named taken_out_inside.jpeg
Thumbnail of the uploaded file named taken_out_outside.jpeg
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Casey from SWISCO responded:
January 29, 2020

Take a look at our 15-199 and 15-205 coil triple support. These appear to look compatible to your original pieces. The 15-205 can be used with the Series 165 coil spring.Your spring should have a stamping or marking on it to determine the spring strength of coil you need. 
Pivot Shoe, 17/32" Thick
Pivot Shoe, 17/32" Thick
15-199
$3.70
3/8" Egress Coil Triple Support
3/8" Egress Coil Triple Support
15-205
$2.10
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