Can someone tell me the thickness and diameter of the ceramic paper filter
discs that are used in, for example, the Hakko 808 and Goot TP-100 guns? I
know loads of suppliers, but I can't find dimensions on these.

I need ceramic filters for a project -- 16mm (5/8") diameter discs. If the
gun discs aren't the right size, I'll have to look for bulk material with
similar flow characteristics, or possibly try to trim the stock discs.

Any suggestions for other sources of ceramic filter paper? Googling has led
to some hits, but these companies require large orders.
I wonder if a diesel particulate filter would have similar properties.

As for cutting ceramic paper, will I need to have the discs custom cut or
would I be able to cut it w/o cracking it or seriously chipping the disc
edges? What tool would I use, a Dremel cut-off wheel?

Thanks.