Tanks

Just a quick one, has anyone changed their Triumph tanks to another type ??
If so, which ones fit the square backbone ?.
I've quickly looked around for photos of other Triumphs with this done but haven't found any.

I had My tank off for a re-spray a few years ago and out of curiosity, I tried an old Honda CB tank I had lying around on it.
Surprisingly I found It would fit, with only a few alterations, (lowering the tunnel at the front) which now has got me thinking about this winters project....

(And I'd probably leave the Honda badges on, just to keep 'em guessing)