you can goto the mongkok八珍甜醋, they can provide 甜醋 only, 甜醋+ ginger, 甜醋 + ginger + egg & 豬腳. Around $400/ 十斤 and they can deliver to u if order 3 days ago by phone.:-P
it will be more convenient for modern family. The most important is who pay for it and who like to eat.