Header Gasket Headache

HI guys. i have a problem trying to get header gaskets( head -extractor) to suit my series 1 AU xr8 - now the problem is not the fact of getting them but getting them to suit my heads , 1st try was repco - right part number and gasket but the port holes were to small
2nd try FORD GENUINE -same problem
3rd try PACEMAKER -GUESS WHAT ? we dont do them
so what i found was - that all gaskets come standard size , so if i put them on i risk choking the bloody thing, i have 44mm ports in my heads and the standard gaskets are way to small, so now my only option is to track down the guy who oriinally put the exaust together so i can find out where he got the gaskets from( big task)
if any one has any ideas it would be much appreciated out: