Hi, I'm working on a home theater receiver that has a blown MOSFET
(2SK3599-01MR) in one of the switching power supplies. I can't seem
to find a replacement from any of the sources I'm aware of.

I was able to find a datasheet on it, and I'm wondering if it's even a
reasonable idea to try to use that to substitute some other MOSFET for
it by comparing datasheets.

If this isn't a completely stupid idea, what parameter(s) would be key
for making such a substitution?

Thanks.