Your dilemma is something that has frustrated me for some time.
If you are looking for a course on HACCP in the packaging industry you need to be very careful that you don't just end up on a HACCP course for food with a little bit of packaging thrown in.
One thing that the BRC/IoP Standard has got right (in my opinion anyway) is that it only uses the word "HACCP" once, and that is in relation to the training of BRC/IoP auditors. Throughout the Standard it uses the phrase "Hazard Analysis". I like to think that this is deliberate, but I may of course be giving the BRC more credit than they deserve!
The distinction is important. Food HACCP concentrates on potential hazards from microbiological, physical and chemical sources. Packaging in most cases is not consumed. Its purpose is to protect, inform and to enable the use of the contained product. Consequently the functional attributes are where additional hazards may occur.
I have looked at the contents of several courses over the past few years and most start off talking about packaging and then slide into food hazards like cooking and chilling.
The analytical tools of HACCP - the likelihood and severity, validation, verification etc are perfectly valid techniques for packaging, but the starting points are different. I have not yet seen any Packaging HACCP course which talks about the risks of mixed printed materials which is probably one of the biggest and potentiallly fatal hazards.
Sorry I can't point you towards any good courses but get as much information about the course content before you shell out.
As an aside, I am a bit confused by the comments by Theresa about her BRC audit. There is no version 5 for packaging, only version 3, but there is a version 5 for food. I have in the past,albeit some time ago, seen packaging companies audited against the BRC Food Standard. Hopefully this was just a typo and it was a genuine BRC/IoP Certification audit.