Howdy HomagerMan!
HeavyArty is right....
The best 1/32 UH1-D and 1/32 AH-G Cobra where the Revell kits from 1967 and up. Now they are Revell of Germany kits but you can find plenty of those kits on EBAY for 10.00 to 25.00!
They also did a OV loach in 1/32 scale.
Cobra Concepts makes some real nice after market resin kits for the Revell 1/32 scale line INCLUDING a really cool cockpit and front turret set for the 1/32 scale COBRA!
The best UH1-B are the 1/35 MRC kits! VERY NICE STUFF!
1/48 kits are out there ....not sure about quality though.
Good luck!
Straighten up and fly right.....