I made some tooling a while back to press stainless transitions to use when making resonators and smaller silencers. Photo below should explain what I mean a little more clearly:



Works great for gradual sloping cones like that 3" to 4" one pictured. I need something bigger and more shallow for another project. 5 or 6" OD, 3" ID. Normally I'd just use a laser cut disc, but I don't really like the look and for a one-off I don't really want to make the tooling to press something.
I'm looking for something more like a dished end - does anybody know where these can be bought pre-made?

 

Here's the 3-4's in use:




Has nobody else got any input?

 

Got something sorted in the end...