Rebex HTTPS was officially released in February 2017.
the product that you need is Rebex HTTPS for .NET CF and it is still currently under development labeled as experimental beta. We are working hard on releasing it as a full featured Rebex HTTPS component later. But the firm date has not been set yet.
The beta is already available for public testing, so just download the trial from http://labs.rebex.net/HTTPS and give the HTTPS component a try!
You can find code samples, sample projects, as well as current limitations directly at the labs Rebex HTTPS page.