where can I find 12/0 stainless steel upgrades I found them once but can't remeber from where can some one help me out
Steel gears are going to be hard to find, they do pop up on line every now and then. At times you'll get lucky finding them in your reel.
As for other parts, here you go:
https://www.cortezconversions.com/product-page/cc-116-116a-gear-sleeve-ss
https://www.cortezconversions.com/product-page/penn-senator-116a-replacement-dog-15-116-acc
Inserts and drag kits from this seller:
http://alantani.com/index.php?topic=11661.msg113140#msg113140
This knob is pretty tough and would fit the 10/0-12/0 nicely
http://alantani.com/index.php?topic=12785.msg126385#msg126385