For the SanDisk cruzer Titanium U3, there is a sync-software called CruzerSync which really is an OEM version of DMailer.
In the SanDisk U3 Download Central you’ll find a link to CruzerSync 6.2.042.1
which is ancient.
Then I somehow found a link directly at
DMailer.com, which serves CruzerSync 126.96.36.199
(which updates itself to 188.8.131.52 after startup).
Using their old versions list
(where there is CruzerSync 184.108.40.206), I found
out that they store their files in the form
CruzerSyncV6.u3p.zip on the server. So I tried the filename
CruzerSyncV7.u3p.zip and finally omitted the
V7 - and there it was in the download folder:
CruzerSync 220.127.116.11 for U3. (To enable the new black skin, you
have to delete your sync profile inside CruzerSync.)
btw: There’s also CruzerSync 18.104.22.168 for non-U3-sticks.