I have a large collection of images of submersibles I've collected over the years.
I've posted them here- http://photobucket.com/submersibles72
There are some drawings tucked away in amongst all that lot, but in general, information on civilian and research craft is more difficult to find than military boats. Perhaps this is the reason they're not quite so popular with modellers?
The easiest type of boats to model would be those based on cylinders, as opposed to teardrop shaped boats like Alvin, Turtle etc. ABS Elliptical and hemispherical end caps are available to purchase from EMA model supplies, which with the equivalent diameter tubing should enable you to construct most of the hull components from pre-moulded items, greatly simplifying any build, and the cost should be very reasonable.http://www.ema-models.co.uk/index.php/a ... tings.html
Don't know much about the boats fetaured in the Abyss. Good link with info here- http://www.therpf.com/f10/abyss-submers ... ct-129858/
Unless you want to get involved with mouldmaking, I would give those designs a miss.