I have the older Microsoft Wireless adapter. It works well, if a slight bit laggy (the new model supposedly addresses this). It is a bit on the pricey side at around US$40-50. I've seen cheaper models on some of the Chinese retail sites like Banggood.com. Basically any Miracast adapter should work.
That heavy and bulky and expensive Microsoft display dock is advertised as continuum dock, it makes people believe they must need the dock for continuum.