Sending 80 Byte Fixed Size of File in SAP PI 7.11

Hi, I have a requirement that I need to send the file with approximately 80 bytes or less from SAP PI to a receiver system.

The message that I'm sending is a text file with file sizes that ranges from 200 - 1000 bytes.

Is this even possible in PI?

The only solution that I thought of is zipping the file but it does not guarantee that I will get 80 bytes or less by zipping it.

Thanks,

Roni