Customizing tabs in Safari

I'm a long - very long - time user of Firefox but would like to switch to Safari as FF seems to suck lots of CPU on my Mac (in fact it seems to do so on any *nix OS ) but there's one thing that I can't get used to, which is the Close Tab button being on the left of the tabs in Safari whereas it's on the right in FF.

OK, so there's nothing inherently better about them being on the right, it's just that I've got so used to it that I can't seem to break the habit of clicking over to the left-hand side of a tab when i select it which of course in Safari closes the damn thing. What makes it even more annoying is that there doesn't appear to be a Re-open Last Closed Tab command in Safari as there is in FF (Cmd-Shift-T).

Is there an undocumented command-line option to switch the close buttons to the right-hand side and/or a Re-open Last Closed Tab command?