I have a Railking GG1 30-2541-1 with PS2 that hasn't been run in over 15yrs. I already replaced the battery with a BCR. I am having a problem with the station announcements and crew talk. The bell and whistle sound fine but when I activate the station announcements, the speaker sounds very distorted. According to the MTH website, the part # for the replacement speaker is BF-0000021. It is out of stock. Does anyone have any suggestions on a replacement speaker? It is a 2" 16ohm 5 watt speaker. Thank you.