I have a few older Bachmann Steam locomotives that have just become too much to keep running.Most have bad gears.Some have no longer produced shells,or shells I built/painted,some were gifts..I'd rather not return them,I'd just as soon fix them myself,but the gears aren't available from your normal parts store..Is it possible to get them from you anyway? They're all older white gear Northerns,2-8-0's,and 0-6-0's..THANKS!!!!..LOU