Pillion pegs

[unfazed]

The amount you can lower by, is limited by the exhaust, but you could probably drop the exhaust by about 25 mm with any ill effect

http://www.ebay.co.uk/itm/Gilles-RGK-30-...2347f04d23

Maybe a flat bar with 4 holes drilled  appropriately to lower the mounting points of the footrest brackets might be worth a try.