Currently I am not set up to produce straps with rubber liners. Gluing dissimilar materials and finishing the edges of differing materials would present a lot of challenges without the use of the industrial tooling and machines the large watch strap companies have.
Leather straps shouldn't be soaked intentionally, but these will not fall apart no matter how wet they get. Each side of the strap (6' and 12') are made from one continuous piece of leather folded and strategically skived so that it remains the same thickness without bulging etc. These straps are bonded by glue and mechanically with stitching. There aren't any thin liners to wear through or fillers or anything, just vegetable tanned leather.
Having said all of this, I do not think these straps are for you though.