It does work, it is a little thin after you trim where the tenth bolt goes, I think I made one. The missing bolt area is a good spot for a dab of forma-gasket or some other gasket maker.
I noticed that some gasket sets contain both gaskets for the pan. There may be spares floating around in guys "left over" gasket stashes. The non-sandcast/diecast head gasket also sticks out where the front center bolt goes on 23,000 and newer engines.
I'm always amused by the ebay sellers that try to pass a standard oil pan off as a sandcast one. That's as easy to spot as an incorrect clutch cover. I have been known to make a 9-bolt clutch cover from an early 10 bolt one. That really winds up some of the SOOC club members.