Did not know where to post this ... but this effect is "old" and I wish it was "new again" ...
I know there are other "versions" of this effect available, but not the same as this classic.

Does anyone know if it is still available anywhere?

Props:
It will try and explain, best I can.

A small cardbox is shown - approx 8cm length, 4cm wide, 1.5cm deep.
It has several elastic bands on its length and width, entirely securing the box from tampering.
The box does not have a lid, but a slider cover - hope that makes sense.

When the bands are removed, and the cover slid away it reveals another cardbox inside.
This box is also secured length and width by elastic bands.

When the bands are removed from this box, again, there is another smaller box inside.
Again, secured by elastic bands.

When this box is opened, the signed spectators coin is found inside a small fabric bag.
The neck of the bag is also secured by an elastic band.

We all know how this works ... but where can I buy one now??

Any help, leads appreciated

I found mine at the Dollar Store. I had to look around to find the nesting boxes, and I finally found a small fabric bag used by women to hold small trinkets, but it was all right there except for the gimmick. I made that from stiff plastic packaging material rather than metal, which makes the coin slide through more easily.

Many thanks for your reply "jimgerrish" ...
can you elaborate please - where did you find nesting boxes?

Dollar Tree. Sometimes you can find them as "Nesting Boxes" but I found mine separately- large, medium, and small. I prefer the different looking boxes because each one is a small surprise, whereas identically decorated nesting boxes is less exciting...to me.

Wish we had the same resources in the UK,Jim

Next best thing- learn to fold cardboard into boxes. It's not that difficult. Cut pieces of wood into the size box you want to make and use that as a form to bend and fold the cardboard over.Where there's a will, there's a way.

My first version of this often overlooked prop, was the Adams version. I believe Magic Makers sells new versions of those props, including an updated version of the effect you mention:
https://magicmakersinc.com/collections/s......ss-adams

The boxes they supply are silly, but you should get the gimmick you need to make it happen. Then, I would recommend replacing the outer box with a large kitchen match stick box ( https://www.walmart.com/ip/Diamond-Kitch......19792682 ), followed by a regular size match box, followed by any small felt jewelry bag. A bag, inside a box, inside another box makes a great impression.

Jim ... wizard of oz -
thanks for your input.

Still trying to find the finished product in the UK