Engine front cover flange?

[Kim67]

Hi, I'm new here so bare with me. I've just had a quote from the garage to replace the engine front cover flange because of an oil leak. They say its cracked. Could someone please tell me where & what this is as I have absolutely no idea. Also would it be a thing I could replace myself? They also said my fuel pump belt is loose, so want to replace that, the tensioner & the pulley ( least I know where & what they are!) 

All in they want £1022 which i don't have so any help would be extremely grateful.

Its a 2008 A5 3.0tdi sport btw, Capa engine.