Pretty sure that the V2000 series used the IDE/PATA hdd connection, so you will have to find a 2.5" hard drive that still uses that connector.

They are around, and you can get SSD's for them, but they won't have the performance of a SATA SSD.

Unfortunately, they are still sold for legacy hardware, like yours, and aren't going to be cheap.

Honestly, a laptop from 2004 isn't worth putting money into.