How many of the following Kallax products do you have in stock: 1. 002.758.48 white shelf unit; & 2. 603.460.70 shelf divider? Thank you.

You can check the ikea website for local store stock. Go to the specific item page and scroll down to "store availability." As with any store, stock numbers can change quickly but it will give you a general idea.

I would call the store directly for current inventory

Sorry Steve I cannot help you!