mate I would post the same request on these 2 groups and someone there will have the part or be able to tell you where to get it.
http://tech.groups.yahoo.com/group/MelbMeadeScopes/
http://groups.yahoo.com/group/LX200/
http://www.mapug-astronomy.net/
also there is a guy called Ron Samson who fixes all meade classic telescopes his e-mail is
rsampsonus@yahoo.com
last suggestion which is a certain way to get an answer is that there is a guy called DR
P. Clay Sherrod his personaly e-mail is drclay@tcworks.net
and his website is
http://www.arksky.org/
All this information will assist you in fixing your problem and any future problems or questions you may have with your classic.
good luck mate.