Having had a look at the IncuKit, it looks as though the "ceramic elements" are just wire wound resistors with a ceramic case.
From an electronics point of view there is nothing magical about these.
If you went to a place where they sell electronic components and asked for 10watt wirewound resistors you would get something suitable.
The only problem is, what value of resistor ie what resistance. Not knowing what heating power you require, it is impossible to suggest what values to use.
JimB