After a meal that size, the snake could easily go several weeks without eating. I'd give it a couple more weeks without any feeding attempts at all, just let the snake relax for awhile without any outside stress. Then try a small rat. If allowing the snake to get good and hungry doesn't restore its appetite for live rats, you still have several alternatives. Mice work as well, you just have to offer two or three at a time (one after the other, not all at once!). You can also try pre-killing the rats and see if that makes them less intimidating. And you can see if the snake will accept frozen/thawed, which opens up your options to online sources rather than a single local pet store.