The compagny 'Binary Arts' http://www.puzzles.com have produced a game set, that they call 'Block by Block', actually it is SOMA.
It is really a nice package, highly recommendable if you want your own Soma set, or an extra travel set.
It seem to be sold from most Toy shops (At least here in Denmark). A few dealer names are found below.
The set is in light blue plastic and comes together with a deck of playing cards, showing 60 different figures to build. And their solutions.
Most were already in my list.
Unfortunately there are two minor drawbacks:

• They have numbered the pieces different than Piet and all the rest of the Soma people in the world.

      Ours:        1 2 3 4 5 6 7
      Binary Arts: 1 3 2 4 6 7 5

• The seven figure pieces are not allways manufactured in right angles, thus making some solutions wobbly.
  Probably because the cubes are not exactly rightangled cubes, but rather Rhombic in shape. Due to the production method I suspect.

BA 1 - 111   BA16 - 005   BA31 - 095   BA46 - 088
BA 2 - 012   BA17 - 114   BA32 - 119   BA47 - 017
BA 3 - 072   BA18 - 115   BA33 - 085   BA48 - 008
BA 4 - B004  BA19 - 042   BA34 - 093   BA49 - 043
BA 5 - 112   BA20 - 013   BA35 - 006   BA50 - 121
BA 6 - 073   BA21 - 116   BA36 - 120   BA51 - 082
BA 7 - 074   BA22 - 078   BA37 - 094   BA52 - 079
BA 8 - 075   BA23 - 117   BA38 - 092   BA53 - 035
BA 9 - 076   BA24 - 059   BA39 - 080   BA54 - 048
BA10 - 036   BA25 - 003   BA40 - 086   BA55 - 084
BA11 - 023   BA26 - 091   BA41 - 060   BA56 - 122
BA12 - 025   BA27 - 032   BA42 - 010   BA57 - 123
BA13 - 077   BA28 - 118   BA43 - 081   BA58 - 083
BA14 - 051   BA29 - 090   BA44 - 089   BA59 - 096
BA15 - 113   BA30 - 026   BA45 - 087   BA60 - 001