I have an HP 2-in-1 that according to Windows supports a pen but HP doesn't offer a pen for. Apparently HP is purchasing touchscreens from Synaptics which happen to also support pens. Can anyone recommend a pen made for Synaptics screens? It seems like Synaptics deals only with OEMs so there doesn't seem to be any Synaptics branded pens. The ID for my "HID-compliant pen" is "HID\VEN_SYNP&DEV_1000&Col01".