ideas:
(each brick probably contains Inverted, Ceiling, Ceiling Inverted)
>25* to 45* ramp adapter (right)
>45* to 25* ramp adapter (left)
>curved ramp 2x4 (huzzah, sketchup)

>curved edge ramp 2x4 (looks like that but the 4x side is cut off in a curve too)
>large crest bricks (like the centered ramps in ORBP)
>inverted crest bricks