Quonset Doors

1 I am looking for a door for a round Quonset. Currently it has two miserable sliding doors. The opening is 20 feet wide by 14 feet tall. I am interested in the most cost effective bifold door solution.

2 I have a Behlin Quonset I'm looking for a bifold or hydraulic quonset door with a freestanding header.. The hole size is 23'9" x 14'6". I like the Schweiss strap style best and I need a man door. Interested in pricing.