Any Shimano compatible 9 speed cassette - Shimano, SRAM, Sunrace, Microshift, IRD, ...
If the largest cog is not bigger than what you have now you should be good, otherwise you may need a longer chain.
OTOH it is a good idea to install a new chain with a new cassette, then you can size the new chain correctly. You will need to check that the RD can handle it (chain wrap capacity and the largest cog).