On a remote host:
git clone https://github.com/elastic/beats.git
cd beats
# checkout the version via tag
make crosscompile on the product
# pick the binaries and copy them
On the ARM system:
cd /tmp
wget https://artifacts.elastic.co/downloads/beats/filebeat/filebeat-5.6.2-i386.deb
sudo dpkg -i --force-architecture filebeat-5.6.2-i386.deb
# copy from remote host