You have my sincere regrets and a prayer for the return of the corpus. This is what I found on the internet. Find like-minded on fire Catholics in your parish and fight the good fight: (from the Catholic Encyclopedia)
The crucifix is the principal ornament of the altar. It is placed on the altar to recall to the mind of the celebrant, and the people, that the Victim offered on the altar is the same as was offered on the Cross. For this reason the crucifix must be placed on the altar as often as Mass is celebrated. The rubric of the Roman Missal prescribes that it be placed at the middle of the altar between the candlesticks, and that it be large enough to be conveniently seen by both the celebrant and the people. If for any reason this crucifix is removed, another may take its place in a lower position; but in such cases it must always be visible to all who assist at Mass. We remarked above that a crucifix must be placed on the altar during Mass.