Jordan:   Being a cheap old SOB  I would make my own pattern.  Find a wooden chair that is comfortable and measure the angle between the seat and back with your bevel gage.  If you dont have one buy one because you will need it for buiding.   Get some cardboard and start sketching out the backside and the bottom  with the smooth curves  as in Jason's pictures.    Lay it out with a  half lap jount at the back/bottom,stringers between sides at back, bottom and front.  Lay out for the location of the rope holes- 3/8" rope is good and have at it.  The angle between the seat and bottom is important.  We have a captains chair that has too much angle and it is a really uncomfortable thing for 5 minutes- let alone all day.

Good Luck- make some sawdust.

Hi Jordan -- I think Lawrence Long gave you some pretty good advice.  I am just past halfway with building two of my own for my new drift-jet boat.  I too used the Montana Boat Builders site to copy ideas from - among others.  Their kit description at one time offered some good pictures, not quite squared away but enough to get the curving idea. I haven't got my two seats tested yet, so hesitate to recommend what I managed to come up with. I used red oak. My beginning stock was 4-7/8 x 21-1/2 and this includes the lap from each.  I made them an overall width of 17", the spreaders I started with 2-1/4 x 17"" and notched them 1-1/4 inch into the frames leaving  an inch to but up against the inside of the side frames, and install the side screw.

I used a 3/8" otffset router bit with ball bearing to cut the recess for the borrom piece of 3/4" plywood. If I had it to design  again, I'd  increase the width to 18" .  I guesstimated the angle for the back it came out that the top of the back portion was 4" past vertical.  MBB is selling plans now too I think, what the hey, maybe they'll just sell you the plans or pattern instead of the kit??  I made my pattern from a chunk of 3/8" plywood, if  you lived in Northern CA I'd be happy to give you the one I used, but again its totally untested so that would be a risk.  By the way those seats are pretty labor intensive, but I work for nuttin.   I cut the stock out of a 1x12 - 8' board at about $4 a bd ft, this is  for both seats.  I'm going to give them a couple three coats of epoxy and then polish this - similar   to a plastic bar top.   In this picture the two "coffee tables" are covering the motor and pump that I dug out of a Yamaha 760 waverunner.   If you want to give me a call feel welcome.  Don  

The MBB style of seat certainly looks cute and comfortable for passengers, but there are a couple of things to bear in mind:  If it is used for a row seat it will substantially limit your rowing power by preventing you from using your back and leg muscles.  And with the multitude of holes and edges they will be the highest maintenance items on a boat-- probably requiring as much time as the entire exterior of a bright finished Sapele/clear glass cloth boat.