Combination Saw Blade??

I'm trying to find a good quality (50t ATB+R) combination blade for my Bosch table saw (254mm diameter and 24.5mm bore). I've searched all the local outlets (I'm in the Eastern suburbs of Melbourne) as well as the on-line outlets that I am aware of. All without any luck.

I need it to create flat bottom cuts, for mitre keys initially.

Looking for any clues from those more experienced than me.

Thanks in anticipation.