@kalali, there is a Adcom GFP-555 preamp:
http://www.tonepublications.com/old-school/adcom-gfp-555-preamplifier/
You may want to try pairing it with a Parasound JC 2 BP preamplifier.
http://www.tonepublications.com/old-school/adcom-gfp-555-preamplifier/
You may want to try pairing it with a Parasound JC 2 BP preamplifier.