Aux belt tensioner

I’ve bought a 2010 Aygo with an engine whistle. I thought it might be the alternator or the belt (or whatever else runs off it) so bought replacements. 
I started swapping the parts today and found that the tensioning bracket for the belt is broken in two, which I now suspect was the culprit (although the alternator was cracked too). 
I need a new bracket but can’t find the part number on any catalogue and don’t know what to call it. 
Any help much appreciated. 
Thanks

You can find your car here and locate part number than call your local dealer or search eBay or Google for used parts. 
https://japancars.ru/index.php?route=catalog/toyota

Another search option: Amayama

It 2 brackets and 1 long bolt around £10 from a main stealer

16381-40041

16381-40050 with front A/C

Slider - 16385-40011

Bolt - 90105-08433

I forgot this bracket is listed in the EPC with the radiator & outlet of all things

Thanks all. I was struggling to find it as it’s not in the alternator section or aux belt. It’s in with cooling. 
I found it eventually and replaced for £6.60 from main dealer. Pretty good value. 
On to the next thing!