Here's one site. You'll need to shop around for the best price.
http://www.promedxpress.com/products/digital-galvanic-stim-high-volt/?sourcecode=PGOOPF&gclid=CjwKEAiAlvilBRC5ueCzkpXb4kgSJADxop1BQDpzmWaFBwu2RsQgKFLHvKxMR0IWWypRyD5_2PsD9BoCdCHw_wcB&kwid=productads-plaid^253997074076-sku^659+0008@ADL4PROMED-adType^PLA-device^c-adid^51929079066
Google search: Digital Galvanic Stimulation, Ultra G Galvanic Stimulator, High Voltage Galvanic Stimulator
This device will accomplish the same exact results as any of the name brand pulsed current units for a fraction of the cost.
This one works exactly the same:
Galvanic PGS 123 - High Voltage Stimulator - Allegro Medical Supplies