Damaged door frame

[Thuggerz]

Hi all, my dog chewed half of the door frame a few months ago. I have been searching for a replacment but i cant see the correct piece that i need. Does anyone have any idea on what i need? Its flat on the left hand side and rounded on the right hand side of the wood.

Here are some photos

 

[Newboy]

A length of architrave

 

[longdogs]

you probably will not be able to match it exactly so replace the whole strip or replace around the whole frame.