Another poster mentioned Sun Freeware, in my book the Sun-provided freeware binaries are of better quality than the stuff at sunfreeware.com. Also, don't forget to grab the binutils package!

In addition, you can look at Active State's binary distribution of Perl 5.6.1 - if you want something quick, the binary distribution is pretty painless. Not sure if Solaris 7 is supported, we're on 8 at my shop.