doug thorley headers
Here we go:
http://shop.dougsheaders.com/catalogsearch/result/?q=d4477
D4477 picture shows the old 5.7 gasket
D4477-R shows the new 5.7/6.1 gasket (R = Raw Steel I assume)
D4477-B also shows the new 5.7/6.1 gasket ( B = Black I assume)
The D4477 might be showing an old picture as they the later flange would still fit the early heads, I'm assuming they may have updated the flange at some stage. Just have to be careful that others are not selling old stock if that is the case.