Searching about the bit for the past year or so (again) , found a local supplier and the price was asking is 66€ per piece. Efforts to get more than 30 pieces would lower price down to 34€ . Still the hole process, to find all those people who in the initial stages all declare their strong interest and then disappear st oped the hole procedure .
Then we had contacted that same UK supplier (in the post above) who asked for the same things rufly.
Now the details of the US distributor (kindly provided by our new member, as i had lost them) being that same one we had contacted back in 2010 and bought 5 pieces at 46€ a piece, semester that would be the way to go. Local fellow riders here both for K and GS bikes, face the issue very commonly, (actually for DUCATI bikes too) , to the point that dealers are always in very short supply of the connector.
Note that every 5 years or so it is recomented to change the o-ring for the mettalic coupling , mine was done last time with the pump recall.