Looking for an ISO for my m11x R2

Edit : after some researches, I figured out two things :

- my exact Windows version is "421-1403 : Windows 7 Home Premium, 64bit, FRENCH" (thanks to the service code).

- the problem could be that my license is for a W7 without SP1.. but I can't find a legit image anywhere. Is there a way for Dell/Alienware to provide me an ISO of that particular OS ?

Thanks

Hi, i've bought an used m11x  a few years ago, before moving to France.
It has been upgraded with a SSD, worked great until last week.
SSD died, so I changed it for a standard HDD.
But now.. I have not the restoration partition anymore, and I never had the restoration DVD.
The only thing I still have is the 7 Home Premium license sticker.
x86 or x64 ? I don't remember and the sticker is not really readable anymore (but I still have the licence number, luckily the last owner writed it on some manual provided with the computer).
I tried to get a Dell OEM Win 7 (x64) iso, but serial still don't work. I'm about to try with a x86 but I'm pretty sure it won't work.
French Dell support said me that as I live in France now and the computer have been bought from Canada there's no support for me.

So what now ? Its there anywhere I can get an Alienware/Dell image for my laptop ? 

I don't want to :

- buy a new licence as I already have one for that particular computer.

- use a Windows Alienware image coming from some torrent site because probably messed up.

- being charged for a DVD coming from the USA or anywhere else.

Please.