Scott S.
You can raise the 'bird bars by 28mm if you use a set of spacers from Blackbirdspares.co.uk These spacers come with lugs and detents machined into them so they lock in place over the extended fork tops which are also supplied. Bit pricey at £ 75.00 or around $120 plus postage but I find they work fine.
PS You do not have to lengthen any cables or hoses to fit these.
Brian1100xx