found these today , look good and correct me if i am wrong u13 coils fit u12..
Coilover Specs and Features (from dgr email to me):
1) 30 way, Double Adjustable (Damper/ Rebound)
2) Mono-Tube Construction
3) Full Height Adjustable (full threaded casing)
4) Pillowballs with Koyo spherical top bearings (made in Japan bearings)
5) Cold Wound, Heat treated Coils
6) Customizable spring rates, at NO ADDITIONAL CHARGE (plan for roughly 14 days for delivery on custom orders)
7) Customized kits are valve matched to the springs
DGR Suspension systems are NOT rebadged kits currently on the market. DGR makes their OWN coilovers.
9) Top spherical bearing is from KOYO in Japan
10) Seals are from NOK, Made in Japan
11) Fork oil is from IP in Italy
http://www.dgrsuspension.com/NISSAN_Altima_U13_COILOVER_SUSPENSION_p/ni-37.htmlife time warranty in the states.. i may have some spare kings....