I may be looking for the style of master cylinder cap shown in the pic below. There are other "versions" of this style cap out there but I'm looking for the style below...same lettering, etc.

It may not be clear in my photo but one area reads "USE SAE J1703" and "DELCO BRAKE FLUID" in another area. The top of the forward dome on the lid reads "SERVICE WITH DELCO PARTS".

Not looking for a heavily pitted/corroded lid. Good, up close pics will be needed.