According to my 5 minutes of research, you have LA504 Loader. Two different buckets were offered on that loader from what I understand. One is a 'light duty' 60 inch bucket and one is a 54 inch bucket.
I see no reason why you can't put the appropriate 54 inch bucket on your loader. As a suggestion, you might also want to put a 'cutting edge' on your bucket. It will add some strength.
You might also want to consider the Quick Attach if you swap buckets. It's not complicated but it requires some thought and some knowledge from your dealer.
Good Luck