I also have a 'fresh' Pixel Referral code for use with purchase of a Pixel 6a / 7 / 7 Pro, which provides a $100 credit towards a future purchase (not a credit back towards the intial purchase) via a code emailed within 4 weeks after the phone purchase is shipped. Note that the issued credit is valid through September 30, 2023, so will most likely not be usable towards the 8th generation of Pixels (though will likely be usable towards a 7a, the upcoming Pixel Tablet, and (fingers crossed) perhaps the rumored Pixel Fold).
If Hallux doesn't have one available, I most likely would, and will be happy to provide one in response to a PM.