repairing some damage servos?

[t-maxxracer32]

hey guys i have the airtronics 94359 and the futaba s9451 servo and both need a few repairs done to them..

heres my question
on the futaba servo the only piece broken is the plastic/delrin? piece shown here
http://cgi.ebay.com/Futaba-SERVO-GEA...item5ad54e323b the bottom right peice.

now i dont feel like spending 25 bucks to get that one thing. anyone know where i can order just the white piece?

ive checked out all my other servos (probably 10 others) and none of them fit..

second ? is where can i find the gear set for the airtronics servo? ive googled it and didnt find it. also went on ebay and they didnt have anything..

i dont feel like selling them broken cause i doubt theyd make any money and i do want one of them to work for my stamede

and while i am in the servo business......

would it just be better to buy a servo like this
http://hobbycity.com/hobbycity/store.../15.5kg/.16sec

instead of spending 25 on the gear set

over 400 ounces of torque and pretty quick responce.--unless i did the calculations wrong

i need to place an order on hobbycity so might as well add 12 bucks to the order and get a nice servo..

thanks for any help guys