[Swan] need 4 " speaker

[YASH at aol.com]

In the middle of rebuilding my117xc power supply for my 500,I noticed the 4" speaker was shot. It is a cheap little thing with a very small magnet behind it. Thats the problem.. every 4" that I have found has a large magnet behind it and will not let the power supply bolt in. 
   Ive looked every where for this small magnet speaker...no luck. Anybody have any ideas.
73's
dale k8peo