OMG
I'm so sorry to hear that! Why, nobody has told you about the chop procedure, I guess it's kinda late for that one
I don't think you could replace just the plastic alone. Try GAHH Tops. I know one of the member here just recently replaced theirs. The plus side of your situation is, at least it's your chance now to get the glass rear window.
BTW..If you are going to the one that Travis has suggested, call me, I would go with you and bring my box too
Gerry 408-391-8743