There are many brands available in the market.
Miura, Epon, Romaro.... Just stating some of those more common ones. What's recommended may not necessarily be the best for you. Feel and pairing with the correct shaft is what customizing golf club should achieve for you. So go to driving ranges in OCC, punggol and MBGC etc where they have demos for these Japanese iron heads paired with different graphite and steel shafts for you to whack. The process of hunting the right optimal setup is fun; getting the right setup is even better.