Another suggestion, of particular interest to Australians,
is model 550, rev. 3 by Sirius Tech:

umodem0 at uhub0 port 1 configuration 1 interface 0
umodem0: Sirius 
Technologies  Roadster II 56 USB, rev 1.00/1.00, addr 2, iclass 
2/2
umodem0: data interface 1, has CM over data, has break
ucom0 at 
umodem0