hello 172 driver, you correct the V1mcg, not the normal V1.
there is a note in the preamble stating that V1mcg tables are conservative figures for all weight & bleed configurations. so I suppose the correction "bleeds off" is already taken into account & you will not find specific correction tables, unless you contact Mr.Boeing & ask. highest V1mcg for B738 is 106kts(-60°C & -2000ft press alt. 26K engines) well below your normal V1. eg. tow 60ton. flaps 5, V2= 80+60ton=140kt with V1 a few kt.lower. k.regards, bm.