cat mempool.dat | xxd -p | tr -d '\n' | tr -d '\r'| sed 's/0100000000000000[0-9a-fA-F]\{4\}0000000000000100000000010/0100000000010/g' | sed 's/00000000000000000\([1-2]\)000000/\n0\1000000/g' | sed 's/0\{9,30\}\n/00000000\n/g' > mempool.hex
If anyone wants to play with it without running Bitcoin Core, you can download
mempool.hex. If there's demand, I can do regular updates. I've created this dump a few minutes ago from my pruned Bitcoin Core.