If you look at the auction I mentioned you can see that while they're both described as olive,the ones from the seller you bought from is selling them made of ripstop while the other ones are made of cotton. It's entirely possible they used both, as the really high res publicity still of Dexter in the apron looks pretty clearly like the ripstop ones, but the ones I mentioned in the episode look a lot more like the cotton version.
Also, how will you be offering replicas? making them yourself or contracting out? If you do get the interest, how much will they run?