You tried integrastella on eBay? Got mine from there.... was off a breaker, but a quick shotblast and spray and was good as new... Would imagine they're quite expensive.... I may be wrong mind lol
They are all listed under the part list section but here you go bud.
71541-S6M-000 right rear light bracket/beam (tail light/bumper bracket) £17.98 each
71591-S6M-000 left rear light bracket/beam (tail light/bumper bracket) £17.98 each
93913-25110 Screw that fits the bracket to the tail light (need x4) £0.50 each
90301-SP0-003 Nut that fits the bracket to the body (need x4) £3.49 each
Courtesy of a another member, the facelift ones are listed in the section too bud.
I would say your better off going to a local honda dealer and ordering them, that's what I did, but I'm sure if you gave steels honda a ring, or cox motor spares, maybe even tegwia and Hendy as they both say they stock oem parts,
But I don't know how they would do it probly just contact honda anyway....