美国采购需求：医疗金属部件，我们提供什么

I'm reaching out as a graduate researcher from the University of North Carolina at Charlotte. I'm currently working on a project that involves self-expanding nitinol stents, and I was hoping you might have some spare samples or surplus materials from previous projects that could fit my needs. Specifically, I'm interested in stents that expand to a size between 7-9 French and can collapse down to 5 French. Ideally, I'm looking for samples that are longer than 100 cm. If you have any available that meet these specifications, please let me know. I would greatly appreciate any assistance you could provide, as these materials are crucial for my research. Thank you for considering my request!