You definitely wouldn't come up with a fresh 10,000 liters of the stuff just lying around somewhere; at least not without resorting to nuclear chemistry or natural gas processing on a pretty heroic scale; but if you purely needed to ship something, anything, to be able to say that the amount provided wasn't zero; the terrestrial supply isn't zero either. I think the US is good for high single thousands of liters on a typical year, from nuclear warhead maintenance; Russia at least theoretically in the same ballpark in terms of warheads that would need their tritium checked, though no assurances either that that is happening or that they'll sell, they had formally stopped doing so at least for a while over a decade back; not sure what the mixture of reasons was between domestic users and not wanting inferences about their weapon maintenance.
Such a sale would be basically ceremonial if it has to come from the existing supply which is already spoken for every year; and there would be no point in Interlune as an intermediary; but if some finance construct wiggles one way if the sales are zero and another way if the sales are merely small, it presumably might be worth someone's time for Interlune to be listed as the supplier to Bluefors, even if it's just them slapping their label over whoever Bluefors normally buys from and doesn't actually change the allocation to different purposes or the total size of the market.
It's adjusting the allocation that would be at least difficult(potentially viable if the VCs doing 'quantum' are paying better than the people doing ultra low temperature MRIs or academic physics, or if you can out-lobby the 'national security' neutron detector market that doesn't get anyone excited but zOMG Dirty Bombs the Homeland!; but probably not cheap); and actually changing the supply that would be hardest, but possibly of actual interest.