I believe that Dragonetti's original bow and the bass were restored a few years ago - see some details here:
http://www.contrabbassi.it/restauro.html
Does anyone have more pictures of the bow?
See here for an upcoming tutorial on bow rehairing by Craig Tucker -
http://www.violins.ca/forums/viewtopic.php?t=1656
He's a well known bow rehairer and used to have a video.
Sorry, I don't. But not cheap I think. Lazzarato was the maker who restored Dragonetti's bow a few years ago. Ariente is the bow consultant to the major European historical collections. So, they are not beginners!
Also Stephen Bristow (4K or5K)
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Lozenzo Lazzarato
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Antonio Arienti
http://www.baroquebows.net/contenuti/violinbows.html#doublebass