How can I convert a schedule integration to a FTP trigger integration?

We currently have a FTP trigger integration that polls for files within OIC SFTP folders. If it finds a file, then will call a scheduled integration.

This works fine. However, I don't want to have 2 integrations and just put everything to this trigger integration so easier to manage. When I try to convert the schedule integration, the replace step only gives REST API connection options. It does not give the FTP connection option.

Its a fairly big integration and I worry that I have to recreate the whole thing.

Is there a way I can do this?