Replacement Skysteel prototype?

[SamSmoot]

I opened the Skysteel Coffer from the as CRP initially, and got a prototype saw. Decided I wanted to do it as WR instead, so I abandoned the quest "work it harder, make it better" Unfortunately, I couldn't complete it because I still had the saw.
Abandoned again, deleted the saw, tried again, but no-go because I didn't have the prototype needle.

I bought a new needle from Denys (80K), equipped it, but it says I don't have the right item equipped as WVR. I assume it requires the one from the coffer, which I don't have because the coffer was consumed when I got the saw from it.

So, how do I get a new coffer, or the prototype needle for the "Work it Harder..." quest?