Your question is unclear insofar as to how "long" ago this happened. Sounds like an issue of "personal" jurisdiction, or lack thereof. Again, post isn't clear in regards to the timeline. Talk to a family law attorney in your area for specific guidance.
It sounds like you waited until the end of your case before you attempted to retrieve you items. The judge in your home state had no jurisdiction over the Illinois divorce and could not order your ex to do anything. You should have taken care of the return of your items in the Illinois case and long before your case was finalized.
Is Illinois the home state, the other state, or neither? It would help if you could be more specific. Also, when did this happen. We need some reference points, here,
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