I am also looking for an intake valley pan gasket for my 1992 F-350 7.3L IDI. I purchased a remanned engine from Promar but they don't include the intake gasket. I searched every Fel-Pro, Navistar, Ford, Mahle, and PAI part number but I haven't found anything in stock. Several websites such as Advance, Tasca, Heavy Duty Pros suggest they are in stock but they later tell me they are out of stock. I'm not desperate enough to pay $1000 from eBay. The best lead I have is someone from Engine Parts Super Store said they might be in stock in late May/early June.
Any other suggestions? I guess worst case is to remove the old one carefully and reseal it with RTV. Thanks.