I know that steam allows larger inventory limits now, can we get larger limits on our shop inventory either through backpack expander uploads or I would even be willing to make a donation to a higher VIP level of I could.???

Is there a recent change that allows 2000+ TF2 items? Or you mean Steam gift inventory?

Steam gift inventory always allows more than 2000, but it is unrealistic to allow more than 2000 here because it dramatically slows down the website when trying to obtain inventory data with 2500+ items, based on our tests.

I see, but not supporting this many items is a performance issue, not a technical one.