The keyless remote is the same for all 2004-2010's with factory installed keyless. The remote for the dealer installed accessory kit is different. The Honda part number for the remote you need is 72147-S5T-A01 if you need to search for it that way.
Lost one of my remote FOB's for my 2010 E. Fortunately, I keep it separate from the key, so I only lost the cheap part...
The part # and FCC ID from my second FOB, match what I'm seeing for older E's:
Part #: G8d-344H-A
FCC ID: OUCG8D-344H-A
I can find FOB's matching the above dirt cheap, but for those that mention the E, they only list models up to 2007. I'm aware from searching here, that the key chip is different between years - but what about the FOB? Can I get any FOB that has the above numbers, and expect it to work on a 2010?