Hi, you need at least an offside mirror & a centre mirror, but the reality is that you cannot meet the field of view requirements in a 7 type car with these alone, so you`ll need a nearside mirror too ( you`d want one anyway in reality wouldn`t you! ).  
 
Don`t bother with bike mirrors by the way, you need convex glass in them all otherwise you`ll struggle to meet field of view regs  & I don`t think bike mirrors have this. 
 
Dennis. 
 
PS as Bonzo says, make sure they are IVA friendly with regards glass sizes etc. 
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
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