跨站点集合边界的SharePoint查找列

The basic situation is that I have a list of company contacts that exist in one site that I would like to share. The contacts are referenced from a list within that site, and I would also like to be able to reference them from a list in another site collection. Lookup columns can only lookup values from a list within a site, but this is the functionality that I would like across site collections.The basic situation is that I have a list of co