alternatively make your own with two 2N7000 FETs as I have done in the past.
Note that you do need a pull up resistor on the i2c signal lines on both side of the FET transistor to the corresponding supply voltages.
thanks so much - I've run my picaxe at 3 v before
also I am using a LCD which needs 5 v so I will
have to deal with that - maybe ave data and then switch to the 5 volts
thnx so much