leaking differential air actuator

["JOHN URIBE" <jju@faustel.com>]

I have noticed that when I lock and unlock the center diff on my 88 5kcstq, it 
sometimes takes a couple of minutes for the light to indicate that the diff has 
locked or unlocked. I thought I might have a leak in the hoses, but found that it 
is the actuactor itself. there is a little rubber boot that that the rod comes out 
through that has a hole in it. It looks like replacing this boot would fix the 
problem. Does anyone have any BTDT's relating? If I need to replace the 
whole actuator, does anyone have a good source? How much can I expect to 
pay? Do any of you ETKA users have a part number for me? (for either the 
boot or the actuator) 

TIA

John