[CentOS] Newer version of ftdi_sio

I have just bought an FTDI USB UART

New USB device found, idVendor=0403, idProduct=6015 New USB device strings: Mfr=1, Product=2, SerialNumber=3 Product: FT231X USB UART Manufacturer: FTDI

However this appears to be slightly too new for the ftdi_sio driver in C6.4; it's not detected.

If I force it modprobe ftdi_sio vendor=0x0403 product=0x6015

then it gets detected as a FT232RL which is _close_... but doesn't seem to quite work. If I use "kermit -l /dev/ttyUSB0 -C 'transmit foo,quit'" then I get "Timeout" errors from kermit. If I plug the same adapter into a Ubuntu 12.10 instance it detects as FT-X and the same kermit command works correctly.

So I guess I need a newer ftdi_sio driver; has anyone built such, or have instructions?