I've got the same issue , shift pad too far from driver's right hand , thought about extending it out of the dash about 4" , but haven't got to it . There has to be 7' of wiring harness in the dash for the pad.
I believe , that someone had ; or was trying to fabricate; a steering wheel mounted paddle shifter that spoke to the control pad .
But that was a number of years ago , and I'd think if it had worked there'd be a lot more info on it by now.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.