rebuild shimano wheel
Yes, you can order replacement parts from an LBS who is, or has access to a Shimano distributor. 

You are unlikely to find that rim or those spokes in stock, because they are unique to the wheel, and it is not cost effective for a shop to keep them on hand given the relatively small chance that someone will need them. 

Ordering them, though, should be straightforward, and cost less than 200 dollars.