Where in Dakar, Senegal can I find large store that sell's hydraulic fittings for high presure oil.?

I am running a land based drill rig and need hydraulic fittings and hose's. JIC thread a must. I have found small street stalls and been to Caterpillar but have not found what I'm looking for and as I don't speak French and are new to the country I'm finding it hard to locate a proper store. Please note that hydraulics are also refered to as water pipe as well. Thank you. Grant.