Ducmarc, In your original post you said you were looking for an action to build a .318.
You cannot rebore an '06 because the chamber is too large but you can rebore an 8x57 and rechamber to .318 WR if you must have that caliber.
Seems like the supply of 146s is running out. Simpson used to have over 30 in stock and so did Tradex.
Now they have a handful and in poor condition.
You may consider this action marked Belgium but made in China and used by Dumoulin.
http://www.e-sarcoinc.com/dumoulin-mauser-action.aspx
I would not use it but someone is buying them.