Where to find one?

Beatrice has only one 12 volt listed, and it's not for my model.

The rest are not listed volt wise.

'72 models have a 6V system. If you are transitioning to 12V you'll probably need to do a little creative engineering. The Yuasa battery site has a pdf catalog you can download that lists the size of their batteries. With that and a tape measure you can probably determine what will work. I'm sure that some of our PMT members have made the switch. Hopefully one of them can point you in the right direction.

-kevin

I've been looking too, and this one is a good possibility..
BATTERY, C3: WET CELL - 12V - CT-70 / Trail70 Electrical Parts

Dimensions are
3 1/8 L X 2 11/16 W X 4 1/8 H.

Also

Yuasa

YB 2.5L-c-1

Just ordered the 12 volt from Beatrice. Had to buy the mount and strap too. A little costly,but might be worth the brightness if I can put in a halogen bulb.

That 12 volt battery and tray fit perfectly in all the CT70's. I have that very setup and it fits like a dream. I powdercoated the tray so it looks nice.

I got the 12 v bat and tray from Beatrice too for my 74. It worked fine but I did have to modify the tray slightly to move it forward to clear the frame.