The SRAM P5 is available in 122mm width as are the Sturmey Archer 5 and 8 speed hubs if you do not want to cold set your track ends spacing, or cannot do so due to the frame being CF or Alumiinum. All the other 7 speed and greater hubs are intended for 130mm spacing or 135mm.
I have the SRAM P5 installed on a track end frame with 120mm spacing and it works fine. The main thing is that running the shift cable with a clean appearing routing can be a hassle unless the frame is equipped with cable guides for it. BD is offering the SA 5 speed hub on their Mercier OS frame with 120mm dropouts. That frame incudes braze-ons for shifter cable routing.
SA offers a number of OLD widths for their iGH units, alll the way from 110mm to 135mm. Most of their hubs are shown as available in these multiple widths though I am not sure of actual availability in the USA for all the listed width versions of a given hub.
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Gear Hubs Owned: Rohloff disc brake, SRAM iM9 disc brake, SRAM P5 freewheel, Sachs Torpedo 3 speed freewheel, NuVinci CVT, Shimano Alfine SG S-501, Sturmey Archer S5-2 Alloy. Other: 83 Colnago Super Record, Univega Via De Oro
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