Lack of profit
No. <><><><><> Agree with above. The name Regent has been used by several makers, in the US and in Europe. None were high value firearms.
Blue Book of Gun Values
Try gunpartscorp.com
No
No.
Try e-gunparts.com, gun shops, gun shows, want ads.
They were an importer, not a maker. Try want ads, gun shops, gun shows for parts.
Not at this time.
Out of business
No.
No longer in business