So, these POI were available, weren't they. Tom Tom uses ov2 format - are there any tools to convert it to whatever format is for Garmin? Another option is to look here for the list of those including the coordinates.
The coordinates, BTW, can be entered in a spreadsheet and then converted into any format by using gps-data-team tools... I haven't tried this yet.
actually all my TomTom POI's for Vinnies were from my own Fav input when I first went to each one.
I have gone to the site you suggested and have learned to make my own POI's and am now over half way to having all Australian Vinnies sites in my Garmin.