I have never heard of anyone making modern reproductions of the Mauser C96 Broomhandle pistol, but I have heard of the Chinese refurbs.
From what I have read about C96 Broomhandles, you need to be careful when your are hunting one down because you don't want to buy a Chinese refurb. About 15 years ago the Chinese sent over a whole bunch of worn out "refurbished" Broomhandle pistols for the civilian market. The Chinese used the Mauser C96s quite extensively, so they would have been in pretty beaten down shape when they retired them. These Chinese pistols are supposedly dangerous to fire as they were poorly maintained - not worth the typically low price of Chinese firearms. Besides, the C96 is like an elegantly complex piece of machined clockwork from the old world; it was quite expensive to make then and it would be quite expensive to make now - just like the handful of gunsmiths in the states who make brand new hand crafted Lugers which you can expect to pay over four figures for. If I were you, I would go for an original German pistol - the last one I saw was for sale on Astor Arm's website in very good condition for $600 (just the pistol). As hard as they are to find at that price, it is possible.