I recently had to have my front shocks replaced (koni). I originally thought I'd have to burden the cost and was I surprised when the local dealer quoted $3100 a shock that's $6200 for the pair. I know they can be purchased for less ( I guess you can probably get them around $2000 each), but those are some seriously viper taxed parts.
Fortunately, my waranty covered them.
Good Luck
BTW spring and shock come as 1 assy
Phil