Megane rs 175 dci

Hello
New to this need help with wheel bearing noise...loud droning noise when go over 30mph should i change bearing or full disc also is bearing 25mm

 

I checked on euro car parts also on ebay both giving me 25mm bearings...how hard is it to replace?

 

Any chance you can tell me were i can get discs from or the bearings

 

Any

Chance you know thr part number

 

Thank you found on ebay for 20 wil cost 40 to fit in so not bad