I purchased the bracket and switch for the back-up beeper without the beeper.  Go to Messick's parts site: 
	
	
		
			
				
			
			
				
				Kubota Parts Catalog Lookup. Buy Kubota Parts Online & Save!
				
					
						
					
					www.messicks.com
				
			 
		 
	 
. From there go to OPTIONS and then find the Beeper option.  
The parts diagram is there and shows the back-up beeper parts.  I purchased the switch $25.36 #K7591-96450,  the wire harness $16.15 
# K759-96420,  switch plate $2.18 #K2581-6220,  switch bracket $ 7.57 #K7591-96410,  stay bracket $7.57 #k7591-96460 $7.57.  Installation was easy.
I decided to spend the money on the wire harness since it had the connector for plug & play and was the correct length.  You can add the bolts, etc to be sure you have the correct lengths and sizes.   The back-up light is fantastic.    Good luck.