When I bought my TIR3 with VE I received everything, reflectors, cap with metal clip, the base unit it's monitor clip and obviously CD and serial number to enable the VE option.
If I remember correctly the cap and clip came with the Vector Expansion, and the reflector dots came with the TIR3 itself along with an outdated version of the software on CD and the clip for sticking to the monitor if needed. I then just downloaded the latest software from their website without using the original CD.
Since I use the cap with the clip I've not had to use any of the reflector dots.
Of course if you prefer not to use the cap and clip then I guess your only route would be to use the reflector dots in that respect.
I don't recall having to pay extra for the cap or reflector dots. Of course if you need additional reflector dots then I guess you would need to buy them and if the cap is needed due to not buying the Vector Expansion option then that too can be bought I think).
Regards.