I purchased a i12 in late summer 2010 and am now using it as a tender for my sailboat presently cruising in Puerto Rico.  I have had a slowleak in the port chamber since purchase, but have not been able to locate the source.  The leak recentely incresed significantly so that it defates approximatley 1/3 in 10 minutes.  I reran the leak tests from the manual and found that the valve is leaking.  
1) How can I remove/ tighten the valve without the special tool mentioned in the manual?
2) How do a arrange to get a replacement valve?
I can be most easily reached at 
[email protected], however the website login would not let me use that email address.
Thanks,
Bob H