The customer name range for wage types of /0nn

We need 4 valuation basis ,but in system ,only /001 and /002 exist.

In V_512W_B, we need set valuation basis 03 and 04.

That is we need wage type /003 and /004.

but /0nn is in the SAP name range space,

Are there any name range of /0nn for customer?

Or we only can use valuation basis 01 and 02,can not use

other valuation basis?