Replacement of TMG as a reverse proxy

Team,

We are in process of migrating users from onpremise exchange 2010 to office 365.

I wanted to replace the existing TMG infrastructure used as reverse proxy now since it ends the Microsoft support , can you suggest any other application/MS tool that will do the same Job as TMG . Client is cost concerned . please suggest me a simple option to publish the applications (Exchange/share point etc.).

I know we can use the WAP servers to do this , but we don't have this server in current infra . Please let me know any other MS tool to achieve this goal.

Thanks,

Shafeer