Don't know if you ever got the info you needed but my Focus Central 65mm TB used 4mm-.70 x10 machine screws on the TPS and 5mm-.80 on the bracket although I had to tap the TPS to use the 5mm-.80 because of the previous owner using sheet metal screws instead of the correct machine screws. I found mine at Lowes in the section where they have various screws, washers etc. in the gray drawers. Look for the one with metric machine screws.
Haven't had a chance to mount the TB yet but it's sitting in the basement waiting for some spare time.