Hi Koen, since vectors ship on dry ice, location is less important. CHOP Research Vector Core provides another option if that helps. Please do note that most folks are pretty busy these days.
I can strongly recommend the Leuven Viral Vector Core (Belgium). Please check our website for more information: https://gbiomed.kuleuven.be/english/research/50000715/laboratory-of-molecular-virology-and-gene-therapy/lvvc