Reddit mentions of uxcell 5pcs DC3V/0.1A 1.5V/0.05A 10x2.7mm Coin Mobile Phone Vibration Motor

Try looking into something like this? This way you could rig areas around the board like roads and activate them separately.
https://www.amazon.com/gp/aw/d/B00PZYMCT8/ref=pd_aw_lpo_60_bs_img_2?ie=UTF8&psc=1&refRID=009ZF813Q7G9ZRFGBXBC

you can get the vibrators from amazon as cellphone replacement parts. Maybe look into the linear ones i did buy a few recently here in Germany and they should be perfect for your project. Like this One

I found a nice breakout-board on sparkfun (Link!) it works from 2.5V up to 5.5Volts and should have plenty of power to drive the motor.
you could even use a 3V button cell battery, well you may have to use 2 of them in parallel to get a sufficient current but you should be able to figure that out on your own.

I guess you have th necessary tools from your mechatronics Time?

You probably need a small multimeter and a soldering iron.
some wire and the button cell holders.

By the way. I'am using Cynaps Bone conducting Headsets when i driving my car. Ive heard a few stories of people that could regain there hearing with these Transducers. basically the same thing you are trying to build but commercial. Here is a link if you want to try it.

Good luck!

Hi. I graduated as an EE but soldering is beyond me with PD so I might have to ask a friend to build it. The quad buffer has individual /OE pins for the 1V5 motors, I need to do more homework.

UK suppliers

motors

controller

buffer

Hey! I have this same issue right now with my copy. Seems like the rumbles are all about to die! Haha

I'm working on a video about how to fix it (YT:fossilarcade) but I think this is the motor you need. Just need to desolder the faulty on off and replace it with this. I've not got around to it yet, but will carry out some tests and repairs in a few days.