Portland Design Works "Full Metal Fender" for 23mm tires. 25s may be tough. If anything was going to work it would be SKS Race Blades Long. Not to be confused with the original race blades. These attach at the quick releases for the wheels. See Pics Attached. We've had GREAT success with these in our rainy environment.
Click image for larger version. 

Name:	RBL.jpg 
Views:	512 
Size:	61.8 KB 
ID:	15830
Click image for larger version. 

Name:	RBLFRONT.jpg 
Views:	395 
Size:	66.6 KB 
ID:	15831
Click image for larger version. 

Name:	RBLREAR.jpg 
Views:	411 
Size:	61.7 KB 
ID:	15832