The Space Yard handles that nicely, as it repairs as well.
Another thing you can do with retroseries builds towards very expensive ships (such as stellar manipulation ships or RW bases) is to pad early designs with components that have high cost per kiloton, such as plague bombs and null space projectors. Plague bombs work especially well because they cost mostly organics. They help to get the most total overall cost with the lowest cost in any particular resource. NSPs have a high radioactives cost, which helps with this as well. Master Computers are possibly the most expensive (non-SM) component per kiloton.