Oh man, I have mine mounted on some cheapo spring loaded pulley/reel affairs but don't recall where I got them, perhaps a gardening store, or wait, maybe Surplus Herbies here in town, but you don't have one of those in greater Van... 
 
Check a gardening type shop, they often have something similar gear to raise & lower hanging planters? In a pinch maybe a retractable dog leash.... I'm really thinking outside the box now... 
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
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