Nuffield/BMC Head Gasket

[psj12]

I need a head gasket for a 3/45 Nuffield tractor. These had a 3 cyl. BMC engine rated at 45 Hp. There was a distributor for BMC Leyland parts in Knoxville Tn. But he seems to be out of business. Is there another dealer somewhere in the US or Canada that would have these gaskets? I have found them online in England but they want 2/3 more for shipping than the cost of the gasket set.