I slightly wrecked my bike - looking for parts - how do I start? 2003 or 2004 Specialized Sirrus DISC - my son ran into a parked car and now I  need a new front wheel, rotor and fork. The whole thing is silver, Chromoly. I love this bike, it was a trusted commuter during an interesting season in my life.

My very trusted and loved LBS says "Just over $300" to get it back up and running because they only do top of the line work and if something should be replaced instead of repaired that is the way they go. But a new Sirrus (with no memories, and lower components) is about $450.  So I'm in the middle.... ideas from anyone?
Before you start, check very closely at the top and down tubes, about 1-2 inches behind the head tube welds.

Your frame may be damaged in these spots, which is totally counter-intuitive.  A steel bike will develop two rust rings here after a front-end collision.

Use a magnifying glass or a jewellers loupe, and a bright light to look for any cracks or distortions.  A metal ruler can be used as a straight-edge to look for sharper bends.

Spending money on forks may be wasted if the frame is damaged.

That said - I rode a steel bike that had frontal damage for several months.  You need to make a judgement call once your inspection is done.

Can't build a house on a poor foundation; can't build a bike on a damaged frame.