Subaru definitely sell that loom, but it is $$s. My car came with it (in the glove box, like all others), but a fellow Liberty owner who didn't have one got it installed in his 2.5 NA Gen4. Was over $300 installed by the dealer iirc, about 2 years ago.
Weird that a dealer would say they get one from Repco
. They might have to order from their Sydney warehouse, but they do exist. I don't have the Part#, sorry. But it is a genuine Subaru part.
Edit: And yeah, like others have said, if you're happy to wait then you can order from overseas and save a lot of money. If you can't find the Part# and still want to get a genuine part, let me know and I'll bring up the Parts Catalogue software at home.