binutils-2.30.tar.xz.sig uses unpublished key

[Somchai Smythe]

binutils-2.30.tar.xz.sig uses a key that is not on any public
keyservers I could find

gpg2 --verify binutils-2.30.tar.xz.sig binutils-2.30.tar.xz
gpg: Signature made Sat 27 Jan 2018 10:39:36 PM +07
gpg:                using RSA key 8CC5D97DEDD6A491
gpg: Can't check signature: No public key

gpg2 --keyserver hkp://pool.sks-keyservers.net/ --recv-keys 0x8CC5D97DEDD6A491
gpg: keyserver receive failed: No data

gpg2 --keyserver hkp://keys.fedoraproject.org/ --recv-keys 0x8CC5D97DEDD6A491
gpg: keyserver receive failed: No data

gpg2 --keyserver hkp://keys.gnupg.net/ --recv-keys 0x8CC5D97DEDD6A491
gpg: keyserver receive failed: No data

gpg2 --keyserver hkp://keyserver.ubuntu.com/ --recv-keys 0x8CC5D97DEDD6A491
gpg: keyserver receive failed: No data

Where are we supposed to get the public key from?