You say that like you have a currently airworthy Gentle Lady.
You could build one for probably 30 bucks. I use 60 feet of 1/2 OD surgical tube with I think 300 feet of 50 lb test line attached to it as the tow line with a rag tied near the top as the chute. I pull it to about 10 pounds - the gentle lady weighs 22 ounces, and any pull force around 5-10x your AUW will give you a quick descent, anything less may be anemic and more may be violent.
A dog stake works well to anchor the bungee end down. You can also use latex tube which will be more UV resistant, I only used surgical tube as I have a source I can get it cheaply from.