I've been looking for more durable toys too. Turner by himself wasn't too rough on toys, but with the addition of Annabelle, who's now eight months, even the Wubba toy's in shreds--still usable so far, but definitely worse for wear.
I can't personally vouch for these toys, but this website has a large assortment of the more durable dog toys. One even says they'll replace it if your dog chews down to an underneath layer.
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