I had been DM'ing with the Twitter Team and they said they'd see what they could do to help. 2 hours later they said the 45k prem plus fare was available so I'm assuming it just repopulated. Looks like I got the last of the lower priced awards because both LHR - IAH flights have been static at the 115k mile price for a few days so I'm counting my blessings, for sure!