Grease for Fan RC Stealth Transmission?

[fotomatt1]

I just got my Fan RC FR-01 kit yesterday and started the build. The kit is great, but when I got to the transmission, I realized I don't have any of the AE specified grease for the thrust bearing or diff. I do have Cow RC Udder Butter, but not sure if that's appropriate for either of these parts.

Are there any recommended substitutes for the Associated black grease (thrust bearing) or the ball diff (silicone grease) that I can hopefully pick up locally?

Thanks in advance for your help!

[juicedcoupe]

Any ball diff grease will work for the diff. The thrust bearing is regular grease.