Try Thule; just don't mention it's for a Volvo rack as it might confuse them. I use Volvo branded rack components and find that the Thule system is compatible. I've just looked at my keys and none are that number unfortunately Ed
I've managed to get some keys, but it appears to be a waste of time. When the key is turned the whole lock turns and comes out of the plastic cover. I'll have to get some kind of clip to hold them in. Any suggestions please? Thanks, Tony