Carefreeofcolorado slide out

I have a 03 HR Neptune with a carefreeofcolorado slide cover.. The spring has broken and the cover will not retract. This model is SOK 11. Has anyone replaced this with an updated spring setup or what exact parts are needed to fix. I have called company and can sell parts but I am not sure which exact parts need replace. Schematic does not show some parts I removed from tube cover wraps around. I see ebay has kit R00731 for this discontinued model but thought someone on forum might have experience repairing this model. Thanks