There are quite a few different ones around, OMS and Aquatec are two (This is the Aquatec offering
http://www.aquatec.co.uk/pages/carrying/toolpouch.html)
The best solution in all honesty is to get some aftermarket pockets glued on to your drysuit. (On the side of the thigh area works well - especially for rib diving).
Otter or O3 or numerous other manufacturers supply and fit pockets.
HTH
Daz
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