Best way to search for partner reward availability

[Mouse]

I am trying to find availability for reward seats on BA partner airlines (to use the multi-partner award chart) but going via BA.com means looking at each day individually which takes ages because the site is so slow. Does anyone know a better alternative?

[davedent]

AA.com is quite good for cathay but availability varies from airline to airline. For JAL availability esp First is best 2-3 weeks before.