Sustainability continues to be an ever-growing concern, particularly in the context of industrial supply chains, wherein collaborative data sharing ecosystems play a critical role in determining environmental and economic outcomes. Despite advancements in technology, supply chains often remain fragile, lack transparency, and have limited resilience. Manufacturing-as-a-Service (MaaS) has emerged as a potential approach to help address these issues, leveraging technologies such as Digital Twins and Data Spaces to provide a digital marketplace for matching manufacturing demand with available capabilities. However, existing MaaS architectures do not prioritize sustainability. This research aims to address these gaps by proposing an extension to MaaS, focusing on sustainability and being supported by an Internet of Digital Twins (IoDT). This paper reviews the state of the art of MaaS and its core components, identifies limitations in its current implementations, and presents our vision for a federated approach for sharing information within the IoDT.