I don't have one, but I'm an Enfield fan so I read the forums. Basically the Quest is an Ishapore Enfield (7.62NATO) that's been converted to the No. 5 Jungle Carbine configuration. (Except the Ishapore is based on the No. 1 Mk. III and the No. 5 was based on the No. 4 Mk. I) They are NOT known for excellent (or even really good) accuracy, though they should be capable of holding minute-of-mule-deer out to about 150 yards. The No. 5 had a reputation as a kicker even when chambered in .303 British (I have had one of those, and I didn't think it was all that bad, but mine was sporterized - not equipped with the military stock.) To counter this somewhat, the Quest has a sort of muzzle brake. I would bet that makes it REALLY LOUD.
J&G Sales
www.jgsales.com had some a while back. In the GD forum J&G has had a hit-and-miss reputation when it comes to customer service. I just checked - they don't show any now.
As a personal aside, I'm not to thrilled with the "chrome pimp-gun" appearance, myself.