I've got the bits from mine, but it's auto and different as you say. Why stinker? Does it mean you're suffering from fumes? Surely that just means you haven't blanked the exhaust manifold end well enough.
This is one isn't it? Don't think I've ever used it. Happy to swap it for anything e39 that'll fit in the hole that's in decent shape, if you can find something. I don't really fancy the hassle of finding a new spare myself.
I have this one. Silverline 633567 Torque Wrench 1/2 inch Drive 28-210 Nm https://www.amazon.co.uk/dp/B000LFTSG6/ref=cm_sw_r_cp_apa_i_bAsLCbPKWXJRH Cheap and rather good. Successfully built a couple of engines with it. But doesn't go to 250nm :-/