As part of the Net::SFTP::Foreign distribution you will find the adapter module Net::SFTP::Foreign::Compat which exposes the same API as Net::SFTP.

Just add the following line at the beginning of your script:

use Net::SFTP::Foreign::Compat ':supplant';
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... and all the calls to Net::SFTP would be diverted to Net::SFTP::Foreign.

There may be some edge cases where the behaviors of both modules differ, but not in the most common cases. At least I have not received bug reports for the adapter module for a long time... though, maybe that is because it has fallen out of popularity, who knows!