How do I get envy-gtk?

Compaq Presario 543OUS series 5000
Pentium ® 4 processor 1800 Hz
Processor speed 1800/400 Hz
Processor stepping F12
Cache size (L1/L2) 20/256 KB
RAM 256Mb; Clock 1.8 Gb
Hard Drive 30 Gb
16X Max* DVD-ROM; CD-RW
VGA compatible controller: nVidia Corporation NV11 [GeForce2 MX/MX 400] (rev b2)
Ubuntu 9.04 Server; Ffx 3.5.3, Ffx 3.0.14

I'm trying to follow the directions given in:
Answered Question #49668, asked on 2008-10-31 by Steve: Problems with nVidia graphics card on Compaq Presario with 8.10.

When I run the suggested commands: sudo apt-get update
                                                              sudo apt-get upgrade
                                                              sudo apt-get install envy-gtk,
for the last one, I get:
randall@Randall:~$ sudo apt-get install envy-gtk

Reading package lists... Done

Building dependency tree

Reading state information... Done

E: Couldn't find package envy-gtk

randall@Randall:~$
.
When I put “envy-gtk” in the synaptic search box, I don't see anything matching that name.
So how do I get envy-gtk?