With Lando's Millennium Falcon having the escape craft attachment, how about other YT-1300 / Millennium Falcon expansions like the Freight-loading external rover (F-LER) and YT-XC?

https://starwars.wikia.com/wiki/Freight-loading_external_rover

https://starwars.wikia.com/wiki/YT-XC

Both could act as extra defense for the Rebel Millennium Falcon like the Escape Craft does for Scum with Lando's Millennium Falcon.