I have made a similar one using a magic wand and my homemade bench. Total cost was less than $100 including the vibrator and attachments. If you can keep from hitting your fingers with a hammer you can build this.
Give me a few days to make drawings and take photos for posting. I have also built a fuck machine using a salvage yard car windshield wiper motor ($30.00), also very easy with vac-u-loc attachments.
Yea, I know too much time on my hands, but I don't like to watch TV, and Big Boy can get sore so I need something to occupy my engineering mind.
Skybear