Damage looks quite light. You may be lucky! Try a repair- get some thin insulated wire, and solder it between the end points of the damaged track; make sure the wire is insulted from all other parts- strip the minimum necessary of the insulation to achieve soldering. Assuming the only damage is to the one circuit trak- looks thay way in your pic. There are holes at each end so that helps locate the wire, but don't use too much solder lest it bridges some other part.Presumably some resistors and such on the back? Post a pic if u can. I have done loads of repairs just like this, and as I say, yours looks dead easy- if you have/ can use a soldering iron. No black art, just cleanliness and the least heat and solder for a clean 'shiny' joint. Where are u in case I can help? Im in South Cheshire.