Quoted from Zablon:My understanding is the work involved to recreate this is more than anyone wants to deal with. Also...there's a orange bottom that is supposed to go with it? Or was part of the original ramp dyed that way? I see this one doesn't have it.
I spoke with James Loflin a long time back (as I have a NOS clear ramp as well), and he noted both are correct. Just different runs off the same molds.
It seems to be two separate pieces, melded together.