[Suicide Junkie]

I'm sure only the best value in the system for that maintenance reduction works. Otherwise crystalline races would be clearly superior to anything else, with massively negative maintenance costs in their homesystems after a year.

There is no way as far as I know to double the ability amount.
However, you COULD make a mount which reduces the component to half size and half cost. That would serve much the same purpose.
Also, you can add the crew quarters ability to a custom bridge for -1 to CQ requirements.

Having combination LS/CQ components is also good, but it is tough for AIs to use.