Could you manage a set of molds at this point, or is the cost too high to go that route?
Unfortunately not!
To get one injection mould tool made in a "prototype" (Aluminium) tool would cost in the region of £5k per component, the LZ7 would require 4 tools, one for each corner. The laser cut panels would not really be suitable for moulding due to their size, the tooling cost would be high.
A full Steel production I junction mould tool would cost in the region of £10k each for a component the size of an LZ7 corner piece, maybe £20k at a push for a four cavity tool that would do all 4 parts in one shot.
Working off a conservative estimate of £0.10 per moulded piece totalling £0.40 per case, I would need to sell 500 cases before this route becomes more cost effective than 3D printing.
The downside to injection moulding is that once you commit to the design it cannot be amended without great additional cost. So you better be sure your happy to spend £25k!
With that level of investment the money would be better spent in making a run of metal cases.
I'm rambling on, I'm also walking home from a beer festival, so much beer. Maybe I've said too much, who knows!