I had to do it.  I bought the 55W 4300K HID(High Intensity Discharge) kit from HIDworld and I have to say their service is very good, and fast.  And fitted it to an existing light I had which just had a H4 Halogen globe in it.  I also managed to come up with an easy way to focus the beam externally by mutilating a child plastic telescope.  See pics:
		
		
	
	
		 
	
		 
	
		 
	
		 
	
THE FINISHED PRODUCT
		 
	
				
			 
	 
	 
	 
	THE FINISHED PRODUCT
 
	 
 
	


 
 
		
 
 
		
 
	 
	 
	 
	 
	 
 
		 
 
		 
 
		
 
	 
	 
	 
	 
	