The only places that i know of that advertise 440 crates are indy, and carolina machine engines. Check reviews of cme, and i dont think anybody on this forum would recommend Indy. Their parts, yes, depending on application. Most will recommend you buy indy parts from a dealer, not direct.
There are lots of excellent custom endine builders that can do any kind of 440 you want, but they are CustomEngineBuilders, and expertise comes with a cost.
Just a note of explanation, most performance crate engines now are built on NEW blocks that are available for small chevy,ford, big chevy ford, ls etc. The last production 440 block was 1978, not counting the aftermarket blocks that have dried up, disappeared, or cost a fortune.
There is just no supply to build crate engines with.