found these on ebay not sure but id assume they are close to sport lines and for the price i may pick a set up and run on factory shocks for a while
2005-2012 Mustang - Eibach / ROUSH / DUB - Lowering Springs - Complete Set (NEW) | eBay
2005-2012 Mustang - Eibach / ROUSH / DUB - Lowering Springs - Complete Set (NEW) | eBay