For those trying WB 1.3.3 (the latest A500 1.x from Commodore), these 3 files are absent and Say works with the files on WB 1.3 disks that still have the Microsoft Basic on them (1988).
WB 1.3.3 includes an FD1.3 folder that says "Basic FD files here!", and contains all the files in libs: PLUS translator.library. Except they all have the .fd suffix, which I don't know the use for. .fd means FastDir to me.