Hope you got this sorted. In case not, or if someone else references this thread, if you use a large chain pharmacy like CVS or Walgreen's, you can request that they order a generic from a particular manufacturer. I've had to do this with other medications. Just explain why to the pharmacist and they should be willing to call a supplier to order it.

Technically they should be considered different drugs because the delivery systems are different.

The state of generics is a bit scary when you think about the fact dosage is allowed to vary 15% above or below the published dosage, and other factors like fillers, differences in time releasing materials, and even packaging can be a factor. For example, Zofran tablets are blister packed because humidity quickly degrades it's effectiveness. However, only some generics for Zofran are sealed individually and the rest are just lose. Luckily it's only for nausea and vomiting, but when it is something like a time released opiate, it's a whole different story.