Help picking 4 x small tactile transducers and 3 x amplifiers

[super kermit]

Hi All
I want to add 6 x tactile transducers on the cheap to my rig.
NLR Next Level Racing GTtrack Simulator Racing Cockpit.


I already have 2 x buttkicker mini LFEs that I will keep.
https://thebuttkicker.com/buttkicker-mini-lfe/


Software might be;
sim hub OR andres shop


I need
4 x other small tactile transducers
3 x amplifiers to run all 6 x transducers (all @4ohm)


Amazon, aliexpress or ebay as sources are perfect.
Thanks