I believe the charging remotes have to be coded to the vehicle, and if that is the case then that would be a dealer-only item, and from what I understand they are not cheap - in the order of $1000 (despite the fact it feels like a $30 part). In addition, that is contingent on your car having the electronics within the car (i.e. it was supplied with a remote in the first place). The aerial component part of the system in the car is in one of the tiny windows at the front of the vehicle (the ones that throw light over the dashboard at the sides). On my right hand drive vehicle, the antenna is stuck to the bottom of that right hand window (though a bit tricky to see - you need to view it through the windshield, and it sort of looks like a long one of those store security tags that set the alarms off).
So, this is not an easy or low cost item to source, and depends on whether the car even has the in-car part of the system fitted.
Will say, if it were to cost me c. $1000, i would absolutely not bother with it. The only time I use it is to defrost the vehicle and pre-heat in the winter.
We have 2 IMIEVs in the family, both 2012 model years - mine came with the remote, the other one did not, and has not got the receiver fitted in the car either.
2012 I-MIEV Keiko Silver 16K
2010 Insight ES-T 43K
2001 Accord Type-V (F23 manual)
2009 Hornet CB600F