If it must be on the 8th then you have two biz seats on Lan Peru via LIM.

Edited to add: on second thoughts, I think that is not going to work as an All Partner Award; but, it brings the question of the choice of award, meaning that, if all else fails, maybe you should consider a oneworld award. There is the hassle of the second airline, but that can be worked out, and the cost in miles should be the same, maybe even 10K less.