I think the ones on ebay are a different thread pitch. I have another pair that I bought from DW a while back. MD2020 I still need to send you my watch to have them swapped out. I will PM you.
I had to replace the insert on my watch. It has the following parts:
Euromariner case w/ modded cg
wm9 superlume dial and hands
TC v3 band
Clark insert
Watch material pearl