Quick Google on electric ps pumps found this:
Race Pages - Acura Legend Electric PS Pumps
....called them, no such thing for G1 Legends.
Also found
this a Wiki, saying electric PS systems tend to be totally electronic, without any hydrolics which are replaced by sensors.
This Wiki site says EPS is a fairly new technology, at least for mainstream installations.
It'd be kind of nice if one could use an electric replacement just to pressurize the hydrolics of an existing HPS installation, however. That's what's called a 'hybrid system' or Electro-Hydrolic System (EHPS) on the Wiki page. Guess that'd be asking too much as a retrofit OEM replacement on old clunkers anyway.