In the latest issue of DirtBike there was article on modifying the KTM 690 and several of the parts came from Rally Raid in the UK. I checked the Rally Raid page and I was surprised to see that they have some products for Gassers.
http://www.rally-raidproducts.co.uk/gas-gas-enduro-rallye-lite
http://www.rally-raidproducts.co.uk/gas-gas-enduro-rallye-lite