There are two that I am aware of..
TableSmith has it, you may need to download the correct files from their yahoo group.
Evolution has a table generator which I am starting to create this as well, I have done a few things already it is just a matter of me fleshing it out. Where mine is different then TableSmith is I like to know more about the Art object or item being generated, I want to know the quality, what it is made of and such, then have all of these items factored into the end price of the item. (What can I say, I like details) . The Table Generator comes in 2 versions, a stand alone (small app) and a add-on for Evolution so you do not have to more then 1 application running.
Example: silver wall mirror of cheap style (14 gp), pair of gold earrings each with an freshwater pearl (73 gp), blue quartz (10 gp)