It looks like both the original MPC and 2011 Round 2 version of the kit are available on Amazon:
Original (or, at least, listing is using a photo of the original):
plus $3.50 shipping
I did some searching and found no mention that Round 2 did any retooling so either should work... Are any of the Trek used parts chrome? I did see this on their blog:
As I compared the old Pilgrim Observer vintage example to the fresh new test shots, I found that the detail wasn’t quite as nice but it was sufficient in that if you didn’t compare the two side by side, the new ones still looked pretty good. The new ones were very shiny though. Actually, they were too shiny for my taste. I think such high gloss on chromed plastic looks a little too “toy-etic”. Besides, the nature of the gloss, itself, hides or at least camouflages details and I really picked up on that. The gloss had greatly lessened with age from the vintage example and I personally found them much more appealing. They looked more scale accurate and I didn’t think any ‘70s era space agency would go through the expense of chroming parts to a high gloss just for the sake of looks. The parts might have looked like bare metal be it stainless steel or aluminum but not chrome plated. In any case I settled for what we had and let it go.