The HM-3 is my favourite stock pedal of that type. The MT-2 sounds very nice when you mod it.
However, neither of these options really has the HM-2 'rotten sound'. Like Dave says, it's a one trick pony.
Have a go with the HM-3 though maybe. It's based on the HM2 circuit and has more versatility, but be warned you can't get the HM2 sound out of it.