Wetsuit for a skinny kid!

I'm looking for options for keeping my son the diver from freezing to death. He's a 20 year old student in Rhode Island (brrrr.....) working on his Resue Diver certification. The problem?? He's 6'1", 170 lbs dripping wet, 33 inch waist. Zero body fat to speak of, so he turns blue easily. His LDS in Rhode Island suggests Hyperstretch. Joe at Scubatoys chimes in with Bares size MT or MLT (medium/large tall). Both these options sound viable... any others? Any tall kids out there with further info? I haven't worried about this because I have lots of integrated thermal protection. (read "body fat"). I'm trying not to let this get too pricey, 'cause next year he'll be 2 inches taller and 20 lbs heavier!

This is the way I'm leaning right now... http://www.bare-wetsuits.com/product_details.aspx?pid=002127&dept_id=8

Do a custom suit

I have the 3/2 velocity in MLT. I'm 6'3" and 185 (so about what you predict your son will be in a couple of years!), and it fits fine.

I think if I was diving in Rhode Island, I'd want my drysuit!

I hear there is a new less expensive brand that is just like the Hyperstretch.

Definetly get the hooded vest to wear underneath! A hood helps sooo much.