I'm not sure what makes a Handi rifle a "custom" rifle in your estimation... If you mean, assembling a stock, receiver, barrel, mounts, sights/scope, barrel work (turning/cutting/brakes) possibly rechambering... Then I guess all of mine are custom... If Custom is as Tim suggests; a stock made from a kiln dried blank, a machined receiver, and a barrel bored and reamed from solid barrel stock... Then I don't believe there are too many of those... I've never seen one... Fred's would be the closest... Lacking only a custom milled receiver... I'm working on one now with a slim Walnut Mannlicher in 7mm-08... With a shorty barrel and light, sleek scope... I dunno, is that custom to you?