Buying integrins

 Hello. I am conducting some research regarding the effects of gold nanoparticles in inducing cytokinetic arrest in tumors. As part of my current experiment, I need to overexpress the alpha v beta 6 integrin in some cell lines. Does anybody know somewhere where I can somehow order a plasmid containing a gene that would overexpress this particular integrin? Many thanks to anyone who can help me out.