If your forging the engine, the bottom end will not be stock. If you are buying forged pistons, you will need to hone the bores in order for the rings to bed in.
Just spotted this on eBay. Not sure if a rep, looks like a mix of 96 and 98 spec parts. http://www.ebay.co.uk/itm/Toyota-Starlet-Glanza-v-/281188727160
5.4kg they are. I have a set and think they are great. They have been on the car at least 4 years, only need a refurb as I left them off the car outside during the winter.
http://www.ukstarletowners.com/topic/60523-noels-auto-s-100hp-here-i-come/ That's the build thread. I'm pretty sure the 100bhp mark was passed on this or a previous one of Noel's.
Good to know Mikey, never got round to fitting them and I'm in a bit of a tight spot at the moment, so seems like a good idea to sell. They are still here guys.