What larger discs & calipers for 16'' wheels?

[John Jones Jr.]

Guys,

I want to retain 16'' wheels on my car but would like the option of fitting larger discs & calipers, current front discs are standard 288mm. The question is what one's are a direct fit. Ideally I'd like to go alloy calipers too. I've heard the W124 500E have 300mm discs with Brembo alloy calipers and they have 16'' wheels as standard, would these fit? Or is there another option as the I'd imagine the 500E's are not too easy to come by? Two things: One I want to buy used rather than new and two, I'd like something that's a direct fit if possible.

Thanks in advance.