I thought they all came with a blue one

If you ordered a Mark1, or if you ordered a Mark2 early enough, you were allowed to choose which lens you wanted.

Only with the Rio Car did they start shipping them all with a blue lens.

My personal opinion: All units, ever since the Mk1, should have shipped with a full set of lenses to begin with. My guess is that the amount of administrative hassle required to deal with all the different lens requests far outweighs the miniscule profits they might have made by selling them individually.

Of course, that's just my opinion, I could be wrong.

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Tony Fabris