You need the harness + coding
You can avoid using the harness if you're experienced enough with wiring and can cut and splice but for most people I imagine you'll just end up with butchered non working brand new lci taillights
Wouldn't the applicable GST and duty on multiple taillight pairs offset combined shipping discounts?
I'll see what I can do for you guys given a few people interested.
I've currently got the whole set listed at $995 on www.bmraw.com inc harness but could probably knock $100 off for multiple sets.