White 9" Vinyl Siding with 8 1/4 Exposure

Hi,

I need to find some older style vinyl siding that measures 9" from bottom to top nailing fin. with 8 1/4" exposure in white which is single. The one already on the house appears to also have some fiberboard behind the siding itself.

I need to add some where a window has been removed probably around 40 sq feet of siding needed.

If anyone knows where I could get some, please respond back.

Kevin