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You don't ask easy questions. NSI is out of business. The company that bought there assets Maxwell Propulsion I could not find contact information. Stratus 2000 Inc. out of business. Eggenfeller fincial problems negative reviews. Maybe Ram Performance 5021 Graystone Ave., Blackstock, S. C. 29014 803-899-1960. Or Aeromotive 2796 SE Monroe, Stuart, Fl. 34997 772-240-2266. Also there was a Aeromotive PRU on ebay. I don't have any references on these companies so tread carefully.
Barnstormers had some stuff. Type in Subaru engines.
A company named Autoflight based in New Zealand makes a psru for Subaru EA81 and 82 engines. U.S. distributors - Ram Performance, 2929 Clinton Rd., Clinton, Ohio 44216 (330) 882-6255 Or- Maxwell Propulsion Systems, 19132 59th Drive NE, Arlington, WA 98223 (360) 474- 8118
Thanks so much for the info!