240sx NABCO BMC CAP HELP

[Zeph240sx]

so i think my BMC cap is bad because it leaks from the top under hard braking. *because all the fluid is to one side*
So i went to Nissan they only have Tokico style Cap while i have the NABCO CAP http://postimage.org/image/meljjs2jr/.
Nissan said this cap is aftermarket and i was like wtf? And i also went to Junkyard but no luck also tokico style cap

So im wondering how or where should i get one of these??

[biggie]

Pretty sure I have a brand new in the bag OEM cap if you need one. Its the flat kind, never noticed one with that double decker look before.

But caps should be pretty easy to find in junkyards/websites/etc.

[Zeph240sx]

i tried the flat kind, the threads on the cap are not engaging on the reservior unless maybe i need to press it down harder for it to engage

im using a BMC38

[OM3GA]

Is yours missing the large o-ring by any chance? Maybe try and replace the o-ring using one from the flat style cap...

[Zeph240sx]

no it does not use O ring, but i could try and jam one up the cap.
ill take a picture of how it looks

[breadbox]

None of mine have that cap.