That’s going to be a tough one to negotiate.
The court presumably has made an order against the builder. If it’s did not include an order for costs related to compensation of tenants or relocation of owners, that boat has sailed.
You can try claiming against the OC, but I doubt whether the OC insurance will cover this as it’s not related to an insurable event.
So claim against the OC but in the end you will be footing parts of the bill.