Sorry to hear of your experience. And I know whereof you speak, as I, too, have had a two-blowout day.
First one to go was right front. Sounded like I hit the right berm rumble strip, and a mile down the road somebody honked, waved, etc. So pull over, and yup tread came off, and tire is shredded. No other damage, thankfully. Put on the spare, got off at the next exit, and only store was Wally's. They had pre-mounted tire in my size, but cheap Chinese and bias ply. But any port in a storm, so I bought it for a spare, planning to just get 5 new ones, good ones, and I'll take the Wally one back after I'm sure I won't need it.
Couple exits on down the road, there's a tire shop, and they happen to have 5 good radials in my size on the shelf! Yipee, I'll take them all. Get back on the road, couple more exits, and I get off for a local attraction. Come back a couple hours later, jump in, and set out again, but only get a block or so and I get flagged down again. One of the new tires had gone flat, and I hadn't noticed, but the block I drove was enough to ruin it. Put on the new spare, and the Wally tire is now my spare. Grrrrrrrrrr.