I'll put it on the list to maybe figure out. It's technically possible, of course, but since I want to limit chests to one slot to prevent people from just using them as storage, I can really only safely have one stack (full or otherwise) in transit at a time per requester or else it might have nowhere to go.
I do want to figure out some solution for sending over asteroid chunks faster though, and this is (tangentially) related, so it might work into that.