Wow! I just got 2 from Amazon about 10 days ago, but now I see they're totally out of stock.
However, they say they will be back in stock soon, maybe as soon as a couple weeks from now?
My local Walmart sells an Ozark Trail summer bag that compresses down as well as anything at that temperature rating, $35 CAD, often cheaper on sale. Honestly for summer you should be fine with the cheapest thing that compresses to the size you're looking for.
Naturehike down bag - this one gets good praise as a budget down-filled bag, $85
Blue Ridge Activ Packable Throw - this is the famous Costco down throw, $40