Looks like the same Telstra Deal from May - https://www.ozbargain.com.au/node/622773
They changed the link, but I still had the item in my cart from back then, I couldn't find the one with a headrest though.
Edit - Just got off the phone with them asking about lead times, The lady on the phone seemed quite annoyed and said "you must have seen this deal on Ozbargain, It's only for Telstra employees" looks like they've now changed the link and removed it from my cart.
amazing chair, worth every dollar. got one in the last deal.