No other sources for point available? Amex, Starwood, Accor come straight to mind (though the Accor option is a ripoff in most cases) I'd look how much Starwood points cost (20k would transfer to 25k AY) - and they run a 35% off promo until 14/July.

And how come you need to buy 30k points? 5,2k TP = 15,6 points, so probably you need to buy 20k and convert those to TP (I didn't look into what blocks are available for purchase and for transfer, so I may be wrong here)