the Raging Bull series was replaced by the raging hunter series and the longest S&W 500 barrel 8 3/8 it is out of stock at this time budsgunshop.com/product_info.php/products_id/150921/taurus+raging+hunter+500+s%26w+mag+8+3+8+two-tone+5+shot

Hi Michael, the Raging Hunter with 10" barrel is no longer in production. I would check on large gun sites like gunbr0ker and Guns International as discontinued and hard to find firearms show up for sale by private individuals and small shops.
Stay safe & have a great day!

Hi Michael and welcome. Available here : https://pointblankrange.com/product/taurus-raging-hunter-revolver-black-.500-sw-mag-10-barrel-5rd-rubber-grip-picatinny-rail -------- Cheers and stay safe!