Small Rack For Mixer,CD, and Tape Player

[Albert]

I recently bought my son a mixer, I'm also going to add a CD and Tape player. The intention is for him to be able to play along, mix,
and record his favorite songs.
I was wondering what would be the most inexpensive way
of rack mounting all this stuff while still keeping it portable.
If anyone can recommend a mail order house or an appropriate
method of mounting.

Thank you-Albert