I have a new old stock Weihrauch HW52 action for sale on the ASSRA site:

http://www.assra.com/cgi-bin/yabb/YaBB.pl?num=1294091013

It is most suitable for building a modern target rifle in something like .32 Miller Short, but it could also be a sporting single shot. It is large like an Aydt action, bit probably won't take cartridges any bigger than the original 5.6x50R chambering. Have a look! Any questions PM me. If someone from here buys it I will make donation to this board.