AFAIK, no one makes repros. The demand isn't high enough to justify production at an economically viable level.
Did some poking around and found a farmyard dug-up, pretty corroded one up for auction in Latvia. Starting bid $50, and you'd have to make the handle scales and pommel for it.
http://www.ebay.com/itm/SVT-40-Tokarev-bayonet-blade-/172801391176?hash=item283bc3fa48:g:TF4AAOSw2gxYvwUm
TBH, it's kind of a cool item, and I would leave this one unrestored in a glass case if I bought it.
Best bet is to watch evil-bay like a hawk and try and catch a deal. SVT-40 bayos are far less numerous than the rifles, but they do show up from East Euro sellers every now and then when someone finds one in a barn or some such.