Interior help.
 

I'm new to this, and the toyota supra, i'm buying a 88 non turbo, have no idea the body stile, but have been reading threads and on google for hours doing research as this has been a car i've wanted for a long while, just now able to get one though. The interior needs a little tlc, theres a panel missing from the rear drivers side back seat, the window/mirror panel in the driver side door, and the lock panel in the drivers side door, and the buttons need replaced for the a/c well they don't need but the outer coat/ sticker thing is falling apart, and i want to replace them and make it look nice. Does anyone know where i can order these parts or just like get lucky on ebay, is anyone selling them and could help me?
like any websites for these things?
also i want to replace the speedo and rpm gauge and all that, make it cool, any help for that?

I'm slowly starting my interior work today. I'll let you know if I come across anything of use.