In recent decades, stimulated Brillouin scattering (SBS) has received little attention in long-distance communications because it causes signal degradation. However, in recent years, on-chip SBS has attracted considerable interest due to its high gain and sharp phase response, leading to improved performance for many microwave functions such as frequency measurements, filters, slow and delayed lines, and much more. As part of the LiSoNIP project, we aim to investigate stimulated Mandelstam Brillouin scattering (SBS) in new polymer-based photonic platforms that enable the fabrication of complex integrated structures through 3D printing. Compared to the state of the art, this can achieve at least twice the gain of light-sound interaction.