Please be a bit (or byte ;-) more precise: Do you need an SPI master that addresses 4 slaves or do you need 4 SPI masters?
Please download and install Creator 4.0. There are examples for SPI and a datasheet for each component.
If you mean a SPI component that uses 4 data bits: I think you would need to implement your own component (in Verilog). You can combine multiple UDBs into one with a larger data width if you need to.
Depending on the feature set could do this with the already existing basic blocks (muxes, shift registers and DFFs).