So it appears the ability to change the headlamps has been added to the tbx-external role in toolbox. So in theory you could just buy the 1 day subscription or share a month or year subscription instead of paying a 3rd party. Changes other than the ones listed below would still require other means
Code:
"tbx-external":["coolantpumptype","ecallenabled","forwardradarhw","headlamps","packperformancedeviation","powerliftgatetype","steeringcolumnmotortype","supermanifoldtype","towpackage","tpmstype","twelvevbatterytype"]