Reminder - happy shopping is still possible!!
I just went onto the Royal Colors site (I have no personal connection to them) but have received great quality bulbs even this late in the season. I assure you it's still nice and cool in The Netherlands and the bulbs are in great shape. Their prices are extremely fair (4 bulbs and shipping for about $62 US...that's comparable to what you'd pay for hard to find hybrids here).
I hear that a few other suppliers in the US have some bulbs left or are making their last shipments of the year. You might want to call to see if White Flower Farm has bulbs left as I heard they were close to making their last shipments for the year. Their quality is also excellent and I look forward to seeing what they will be offering this fall. I met the WFF manager (Robert) at Keukenhof and we both admired many blooms. I hope some of my "favs" show up in catalogs this fall!!
Happy shopping! It's not too late!!