Be aware there are 3 versions of the UK tank.
The first was introduced in late '71 and had a mulitpiece chrome trim strip on the center tank ridge like the US versions. In fact the US/UK tank trim pieces interchange except for one strip.
In late 72 for the '73 models the tank was changed by deleteing the chrome strips. In other word the tank top was now smooth. On both these tanks the petcocks were located at the rear of the tank
Starting sometime in '77 the tank was again changed by moving the petcock locations forward as shown in the picture you posted. The earliest bike I have seen this tank was on a '77 TR7. I believe the last change was caused by the new sidecovers introduced with the Jubilee model which is shown in the '78 parts book. Also if you obtain one of these tanks you MUST USE the UK seat which has a different nose from the US model. Failure to use the UK seat WILL result in stress cracks in your UK tank.
I have a '73 UK tank on my '78 T140V and use a '82 UK seat it is worth the change.
None have the tanks listed on their websites, however I'm sure if you send them a mail or give them a call one of them will be able to find one for you. I use Supreme Motorcycles for most of my stuff and find them very good to deal with, I've also used TMS a few times and they are also very good.
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