Need anything on the Alien APC and Dropship

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1

Hi all,
I am trying to scratchbuild the APC and the Dropship. I know SMT has them but they are in 1/48th and what I want is 1/72nd. If any body has any plans or drawings please let me know. I will be more that happy to compensate.
TIA

2

If it helps, I heard that the original dropship model (not the one in the movie, but the one before that) was made from an Apache helicopter model.