FWIW, the picture you posted is definitely of the newer lid, the taller/thicker one.

While I didn't think of those cans as truly waterproof, I would never have guessed that much water could get in just standing upright.

Perhaps the BV folks would respond if you contacted them. At a PCT gathering some years ago I met the president of the company and he struck me as a really nice guy. In particular, I had the old lid and he worked out with me to mail the new improved lid to my house. For free, and in time to get it to me by the time I needed it.
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Brian Lewis
http://postholer.com/brianle