PolySciTech (www.polyscitech.com) provides a wide variety of PLGA polymers. Recently these types of polymers have been used along with 3D printing techniques to generate scaffolds with interconnected channels that allowed for growth of stem-cells. Read more: Zhao, Xinru, Libiao Liu, Jiayin Wang, Yufan Xu, Weiming Zhang, Gilson Khang, and Xiaohong Wang. "In vitro vascularization of a combined system based on a 3D printing technique." Journal of tissue engineering and regenerative medicine (2014). http://onlinelibrary.wiley.com/doi/10.1002/term.1863/full.