Check this they sell the grease at Ace Hardware, who'd of thought that, not me. I got it on Amazon, it doesn't need to be PTFE, it needs to be synthetic it's the petroleum that drys out the urethane and makes them crack. Amazon has the tubes for a grease gun too.
I am with Bob, on an NA you need to do both or get someones old GXP bar they aren't using anymore with the stock front one. The stock GXP bar is the Z0K bar for the NA. By the way the front bushing for the GXP is 1 5/16" same as 33mm both Summit and Jegs stock them for under $20 and they have Zerk fittings. I have been having a ball taking 90 degree turns with out slowing down, car just stays flat, it's cool.