I don't know where you're located... But the Tylie Malibu does have a store locator--you can see whom in your area carries their bags and see if they have the bag you want, here's a link:
This store has a black suede classic--but it doesn't say the size AND I HAVE NEVER PURCHASED from this store. They're located in PA--maybe someone can vouch for them...
Personally, I'd suggest that you order it through a department store. Don't know if you have one where you live, but Nordstrom has a GREAT return policy. Their shipping is only $8.95. And they'd be more than happy to track down the bag for you. Both the South Coast Plaza store and San Diego stores in CA carry Tylie Malibu. The SCP store's phone number is 714.549.8300. SD's number is 619.295.4441. I'd recommend them b/c you're guaranteed the real thing and a purse in good quality...