I have 3 old bikes all have been in a shed out of the weather for about 20 to 25 years. tires are rotted. on has a front fork suspension not working. #1 is a Trex zx 6500 #2 Giant Ricon girls bike and the last one is GT terain outpost. where do i go for parts . I can do the work they all have very very little time riding on them . all the bike stores want to do is sell new bikes but i believe they can be fixed and used again any help would be greatly appreciated.