very hard to get. regularly go for over $250. look for a TS 400 one. they are better than PE speedos. only cosmetic difference is black face instead of brown and i think the trip meter knob is slighly different shape. TS 400 has chrome ring on bottom bu taht just comes off, its only decoration.
if you really want brown face you can pull apart the speedo and get a sign writer to print a brown face that you can stick over the original black one, or paint the face brown and get the white numbers printed on.
there is a NOS PE speedo on ebay in US from seller two wheels unlimited. i will get you his email.