Avery label template missig

[Pat]

If this is not the area to post, I apologize, but I am not sure where my question fits.

I would like to make a layout for printing tent cards (avery 5309), but when going through the 'label wizard' in FMP, this particular number doesn't show. Is there a way to add templates to FMP? I know I can build it with the custome feature, but I was wondering if there was a way to update the avery list.

Thanks!