Suggestion for which SSL service with hyperserver configuration

[a.sanf]

Hi to Everybody

I recently developed a internal business application, using UNIUGI in application mode and then using HYPERSERV, which has been configured (as followed by tutorial) to handle the HTTPS/SSL protocol, using as an example certified by the demos.
In the company we have a server with an fixed IP address, and configuring everything I have demonstrated that the functioning is perfect(user's browsers highlight the lack of a secure SSL certificate). Obviously now I need to create an SSL service at the application level, but not at the domain level. Anyone have any idea of some paid service for my purpose?

Thanks

Antonio