Need motorcycle seat vinyl and foam

I'm building a middle seat for my RZR so my son can ride along with the wife.
I'm curious if anyone here knows where to buy marine grade vinyl. Prefer black or silver.

i also need to buy the foam. Probably needs to be 3-4" thick. And at most about 12" wide.

or the other option is to find an old motorcycle seat or atv seat and I'll pull the material I need from that.

need it kind of quick as I'm riding on Thursday and want to have this project finished

Western Upholstery at 42cnd and Steele.

Poor child...........[ROFL3]
.http://img.tapatalk.com/d/14/06/23/6ehemyzu.jpg


Sent from my ass using re-fried beans.

Well western was closed Sunday and my sister was at Joann fabric which happened to have a huge sale so I got 3 up inch foam and marine grade black vinyl for half off. Seat should be done for under $30 instead of the 200 they wanted for a factory seat.