I don't think you can get the original fabric now for the blue dot ones - There are a few that can get very very close as they've done loads.
Capital Seating will only do them if you take the seats to them when I last asked, they can't confirm a match without them being there, and you confirming you're happy with what they're using.
Steve Murr does them very very well. I highly doubt he would sell the fabric (or tell you where to get it from) as it's him that has gone through the R&D to make sure it's as close match as possible. Last post I saw he charges £330 for the full side that you would need including foam.