Is that an early model 450..?? Looking through the parts list on the Case Construction online parts catalog for the 450 (there were 2 versions) I see no matching part numbers for what you have listed. Are those part numbers from a hard copy parts book..??
If in fact it is an early 450, not a 450B or 450C, etc. as mentioned, there were two models of the, "straight 450 model". In that case, you'll need the serial number from your tractor to determine which of those you have.
I've attached a link below to the Case Construction site, with various models of the 450 crawler (amongst other 450 models of different equipment.) Look through the list, and determine what you have. Look for parts matching your numbers above, to OEM numbers. If OEM parts aren't still available, you can use the OEM number searching through a search engine such as Google, and find aftermarket parts.
10 years ago when working on my 480C backhoe brakes, I found some high quality aftermarket parts here:
Remanufactured Transmissions, Torque Converters, Engines - Joseph Industries It was less expensive at the time, to buy complete newmaster cylinders through them, than just the kit to rebuild the originals. The originals were in pretty bad shape from rust corrosion, so I took a chance. I still have the hoe, and brake cylinders are still working as well, as when I put them on.
Hope this helps.
Official Case Construction Equipment Online Parts Store and Parts Look Up. Parts for Case Equipment and Construction Equipment. Parts Store for Case Wheel Loaders, Case Excavators, Case Skid Steers, Case Original Parts.