I have two three truck shays which experienced truck problems last December.  One I received as a Christmas gift, It ran on my test track fine but when coupled to a string of three Bachmann silver series log cars, it remained stationary.  I am trying to repair or replace all three trucks on both engines as the bevel gears appeared to have come unglued as they slide on the drive shaft. 
I was wondering if Bachmann has parts to repair these finely detailed engines as I have tried since December to work with the customer service staff, each time giving me a different answer about the availability of parts.  The last time I contacted customer service they stated the Middle truck is out of stock, and then one appeared in my mail.  So I currently need to replace all three trucks on one engine and a front and rear on the second.  Both are under a year old, purchased in August and December of 2008. 
The last time I contacted customer service they indicated a recent run on people requesting shay trucks, and a short supply of parts.  Is there any plan to redesign the shay trucks or improve the glue used to hold bevel gears in place?  I am posting this message as a last attempt to repair these two shays as it has been four months since they required repair and after numerous calls to Bachmann I have been unable to gain insight on how to repair these two shays which were to be the centerpiece of my logging railroad, and currently remain idle on a display shelf.

Thanks,
Richard