While browsing on the Nike Veterans Facebook site, I found a posting from the California National Guard Museum Historian.
I asked him this question on Facebook messinger

Do you know where the ARADCOM Trophy is ?
I received this response from our California State Military Museum Director, SGM Deniel Sebby.

I can assure you that the trophy is not missing. It was recently displayed at the final reunion of the 1/250th ADA and 4/251st ADA. It is stored at the Museum Support Center South Camp San Luis Obispo. Once we procure the proper display case, it will be permanently displayed at the California State Military Museum located in the new California Military Department headquarters in Rancho Cordova. That facility also serves as a display location for regiments no longer in the force structure, including the 250th and 251st ADA.
Once installed, I will provide the ADA community with an image of the trophy.
I hope this answers your concerns

Thank you SGM Sebby, for safely preserving our Nike history ! Our fellow SF-88 Volunteer Gordon Lunn, who was a LTC, (IFC)for the 251st ADA Los Angeles, and SF-88 Volunteer, provided me this picture of the trophy.
Thanks Gordon ! It was displayed at the recent reunion for the California National Guard 250/251st. ADA reunion. The 251st was the Los Angeles National Guard ADA Battalion The 250th was the San Francisco National Guard ADA Battalion