Where can I find the sheet metal to make my own what's next?
Thanks

Sheet metal store or industrial metal store.
By the time they cut it down to size and you degrees it polish it and paint it - and I’m assuming you’re going to round the corners (radius them) yourself, I would think you will spend more time then you can buy one for.; Then there’s the issue of getting the gimmicks, You;ll need a punch press in order to make the circles nice and round.

Therefore, you must be making something custom, yes?

Yes . Bats.It's for Halloween. From a book called spooky magic, I think. I
might be best to redo an old what's next.

Andrew,

Alro Metal Outlet in Ann Arbor has every size, thickness and composition you could want. Lots of 12x12 pieces on the shelves. Pretty sure they will cut etc for a fee.

https://g.co/kgs/xzCo6g

Karl Rabe

Thanks Karl

Make your bats of stiff felt loaded with the stuff that makes them cling and you can cut them out with scissors. Try making them black on one side and different colors on the other sides and you may have even more fun in store. More ideas are in "Exposing What's Next" by Spellbinder in The Wizards' Journal #20.

It’s not cutting a rectangle that’s difficult, It’s rounding the corners uniformly that’s not easy. Most industrial metal shops don’t have that capability… I do but I have too many tools for my one good.
If you don’t have old school punches then your best bet is to get the metal water jetted. Sharp corners are just not acceptable on this prop.

Another idea is to use metal shim that comes in rolls (.004-.10). This can be easily cut with tin snips to any shape you want, even a circle. Glue card stock to the front and back. The shim only needs to cover part of the card stock. I've used similar technique in several effects including The Clock of Alexander

Along the lines of Larry's suggestion I was thinking magnets are available so small and thin these days you could embed them between two pieces if cardboard and use washers for the dots. They would be self positioning.

I bought some of these the other day just to experiment with.

http://www.ebay.com/itm/291769873581?_tr......IDX%3AIT

That's a great idea but they wouldn't be self-positioning with any precision. To do that you would need to do a magnet in the board and one in the dot then they would self-position exactly.