Drain Plug Help needed!!

Hi guys,
I posted my Lowe 1436 mod on here.
This evening a buddy and I went down to the river to crappie fish.
When I got my boat to the ramp I went to put my plug in and I found that my battery had smashed my drain tube on the way over.
I managed to bend it back out some what enough to get the plug partially in there.
After about 3 hours I noticed a lil bit of water in the back of the boat.
Can anyone tell me the proper diameter that this drain should be, If its a true 1" I think I can probably shape it back to spec with a piece of 1" bar stock maybe?
Anyone have ideas ,I need some help.

I used deepwell sockets but it still isnt round. just dont force it in.

Hey good idea thanks.
I didn't realize that the drains were so flimsy.
Ill have to pick up a batt box or something to prevent this from happening in the future.

Not sure about actual size, but try measuring the inner dia. on out side of boat. Then You can try tapering a broom stick or doll rod and work the tube by tapping it in. This may get it closer to a tight circle. Like Malaki said use a plug with a snug fit.

Use a 1" wood dowel tapered at one end.

Thanks guys.
I am going to work on it today.
Ill let you all know how it turns out.