Upholstering antique furniture

[Lindsey]

Well, this Christmas I'm a little short on money due to the mortgage and renovations. My parents told me not to get anything for them, but I already got my dad a pretty expensive gift a month ago, and I want to get my mom SOMETHING! So I was searching classifieds and came across something pretty cool... an antique rocking chair that has been completely refinished, except it's missing the seat. My mom loves antique furniture and it would look great in the cabin! For only $85 I think it's a pretty good buy, considering most of the others on the site are $150 or more. I'm just worried about how much work and money it would be to find leather and make a seat for it. It's just a small round hole in the middle of the existing seat. The original seat was leather stuffed with horse hair, and tacked to the chair. I want it to look as authentic as possible, without the horse hair! lol

Has anyone done a project like this before? I may go look at the chair tonight but I don't want to make a decision before I know how hard (or expensive) it might be to finish it.