for a cheapie there's this option, 35w only mind -

http://cgi.ebay.co.uk/BIKE-SLIM-H7-XENON-HID-CONVERSION-UPGRADE-BULB-KIT-2YR_W0QQitemZ380114280106QQcmdZViewItemQQptZUK_Mot orcycle_Parts?hash=item5880939eaa&_trksid=p4634.c0 .m14.l1262&_trkparms=|301%3A1|293%3A1|294%3A30

or this twinset at 50-55w, buy it and split it with a mate? for the carriage they charge it must be hand delivered on a silk cushion though.

http://cgi.ebay.co.uk/HID-XENON-CONVERSION-KIT-50W-55W-H7-6000K_W0QQitemZ350204253027QQcmdZViewItemQQptZUK_C arsParts_Vehicles_CarParts_SM?hash=item5189ccd363& _trksid=p3286.c0.m14&_trkparms=66%3A2|65%3A1|39%3A 1|240%3A1318|301%3A1|293%3A1|294%3A50



but i have to admit the HID50 stuff looks better.