Anyone know if/how I can upgrade on LATAM?

Have and upcoming flight JFK-LIM-CUZ in econ paid for by client and would love to upgrade to biz.

I have no status with LATAM, but I have Ex Plat with AA (OW Emerald) and a good stable of MR, UR, TY and SPG points.

I am completely unfamiliar with their FF program and its rules, but if there is a way to do it I would love to know.

Thanks.