Never heard of them, no affiliation, buyer beware, etc. For the Gen 2: https://evbatterycenter.com/HAC4/index.php?option=com_content&view=article&id=61&Itemid=630 *Soon will be able to offer conversion kits for 2010-2014 Prius, C, V MSRP: $8,00-12,600 (40-60 miles EV)
Even if they were in business, the minimum price (due to inflation) would be $10,000, which basically doubles the cost of a 2004 - 2005 prius. I don't think I would live long enough (in my mid-60s) to recoup that cost. Why wouldn't I just buy a used $20,000 phev or EV? It is likely to have over 100,000 less miles. .