Find the website / retailer / manufacturer of the hugger you are interested in and ask them, perhaps?
Some (but not all) seem to change design / part no. from 08 onwards, if NN's website is anything to go by, I assume to clear ESA gubbins etc.
If you want a NN fibreglass one to fit a 1200GS / GSA (prior to '08) I will sell you one, unused and in original box at a 15% discount on NN's website price, plus postage at cost.