The garage ships are a wonderful combination of block and device type.
Is it possible, you can make a block we can purchase, when we put it on our ship it will allow us to make a further purchase from a short list of special devices to place on an entity.
for example after buying and placing 1 single block on my SV, if i then type a command egs:refit:FP the FP would mean food processor in this case and the server would replace the block I placed with a CV food processor.
Is that even possible ?
I would not want to make a idea that renders garage ships pointless though so perhaps limit to what we can have and how many.
eg:
a player can place max 3 unique objects on his or her personal entity
And the list of available objects to choose from should not contain everything garage ships can have.
But could include things like and are not limited to:
HV med station or clone chamber in a SV
CV food processor in a SV
And perhaps even some cv deco screens which actually look brilliant as small control panel and displays on HV and SV.
Just a few thoughts anyway 
