Ihave about a 30 year old rittenhouse with 4 chimes.It seems that the solenoids that activate the strikers,are getting a little lazy.I have had one apart and try to clean it ,with not much succes,I even lost one of those tiny springs. I tried to replace it with a similar one ,but it's not right.Do you carry replacement parts? What do you suggest? We love the unit,and we hate to give it up.Please give me some leads,I would appreciate it .Dominic.