So this isn't the same type of antenna you're looking for, but I've had really good results with this antenna, "Maxxtena":
Welcome You can get it on ebay, and it's not that expensive. It may look a little like a 'bubbasmith' set up, but I use this antenna exclusively on my BCD396T, both mobile, in camp, and at home, and I get more than satisfactory performance (compared to a small handful of antennas I've used previously). Obviously depending on all the mitigating factors of radio wave propagation, equipment, et al & ad nausem, my area of decent reception is consistently the largest I've had compared to other ready-made, low-cost, decent antennas, which is the type I can afford usually. At home, I'm in a valley 10-15 miles across with mountains of + 2,000 feet in 3 directions and get rx from 50 mile +. When I'm at altitude during hunting season (6,500-7,000 ft) the reception is phenomenal, again subject to the laws of physics/nature. I'm not sure how that compares to more expensive antennas, but I'm very happy with it.
It wasn't what I was looking for the last time I needed an upgrade, but it certainly has been. The fellow who makes them is very friendly and easy to talk to. The design allows for a low-profile, which several of the county and muni pd's have taken advantage of and to whom he sells regularly.
For what it's worth-
