Any ideas where I can pick up a new one? eBay no luck. Looking for the grey and black Efi tank.

 

Also leaks when filled over 3/4 full

 

You may be stuck with getting a paint job if you find another tank. Likely to be difficult to find matching paint this many years out. I'd also recommend treating the inside of your next tank with something like Caswell. HD has or used to have tank cream, which I've seen peel off in sheets over time.

 

If you can find one with an anniversary paint job like yours, and it's in good shape, grab it....

The tank shouldn't be too hard to find used, in other colors... but that Anniversary paint job is hard to replicate.

The tape in the stripe is no longer made by the MoCo.... I've heard there are aftermarket "replicas" of that tape, but can't speak to their quality or availability.

Good luck with the repair....

 

Several online used HD part dealers, large one out of TX I dealt with years ago but lost their contact info.
Like the hattitude said, paint scheme specific is a rarity. I'd live with what I had and touch it up best I could or find a decent painter.