Hi Shannon,
I m the best man for Altezza Dins in New Zealand I got 1 factory Altezza din left If you want it I can save it for you, I know Turbo_Tezza wants one but I will give it to him when the next lot comes, I can offer them before 1/2 price compare to Toyota New Zealand.
As For springs, I got the Lsportline (Eibach) for my IS300 and Hayden (4ROLLN) and (Jetezza) had Kings, I do not recommend them because they are heat formed and will sack within a year or two...I have hook Jase up with some nice Tanabe and soon David on some Blitz, I can get any springs as the best possible rates, you will have to let me know on how low you want it to be!
As for factory alarm? I thought it dosent come with one? you trying to fit an after market one or???
Matt :D