Thanks to Jacob in Singapore for making himself known to me. He's got an MP3 blog called Bryron Bitchlaces, which occasionally hosts Grime MP3's. His latest offering is Roll Deep's "Poltergeist Relay". Nice!
In another recent post he takes up the thread concerning the use of the bassline from Cymande's "Bra" in early House tracks (which was briefly discussed in my 'Jacktrax' post's comments box last week) and has an MP3 of the track on offer.