bstrickler - I think Der Wichtels triple kit will fit a MAg C head.
Check these pics of C and D head on Download's multi sink thread:
https://www.candlepowerforums.com/threads/168062
Looks like the C head has more space where needed at the top.
You may need an extra disc under the Der Wichtel heatsink to take up the space (and provide more heatsink) but the Wichtel heatsink has an extra section on the base that I think fits inside the D tube, not sure if it will foul the top of the C tube though , which sits lower in the head.
I was going to order a kit anyway , so I'll know soon :thumbsup: