I have an order with IRG in progress right now. My email confirmation was 25th of August. Their latest website update says the export licenses were granted on the 17th of October so they expect to have them in Canada this week, and I'm hoping (although they've made no promise) to get it by the end of the month. So.. that's pretty much 2 months, a little over actually. It's faster if you order before the 15th (their export cutoff date for the month), but seeing as it's already the 23rd I would expect ordering one of these lowers to take just as long as my last order.
I'm certainly not knocking IRG for the time it takes. They're very upfront and honest about the process, and they can save you some money if you aren't in a hurry. Most things I'm not in a hurry for, especially this time of year when we are heading into winter and I don't shoot as often. But, for this product, the political climate may create a sense of urgency.
In the spirit of being upfront and honest, it would actually be more than a $20 difference to get one in country right now. Closer to a $50 difference. So it is quite a good deal.