05 Mustang GT Conv.

I have a 05 Gt conv. with only 8k miles.I had it lowered with an Eibach lowering kit. The ride was really stiff so I replaced the stock struts with Tokico D-Spec adjustables. After about a hundred miles the right strut went defective. I had it replaced under warrenty although I had to cover installation cost because Tokico would not cover labor. Now about 6 months later the left strut has gone bad. When I contacted the store that sold them to me they wanted me to send them back. It really hard when they are on your car that you drive everyday. No help from tokico either, never returned phone call or e-mail. I really need some help on what to do. I spent over a grand to try to get a better ride. I am thinking about going back to stock, but i have alot of money in Rims and tires that will not look good in the stock position. Any ideas?