To my knowledge, BA have been struggling with the implementation of CIRRUS to replace the SWORD system for at least the past 2 years.
CIRRUS is a highly customised version of the LIDO solution from LH Systems. You can certainly buy the LIDO solution if you have a shedload of spare cash lying around, wheter LH will successfully complete the install is a different matter.
More information can be found at
http://www.lido.net
Whooaahh!!!