If anyone is in the market for a high-quality, low-profile floor jack to fit under the Cobra, I recently purchased an AC Hydraulics DK13HLQ unit and have found it to be a really nice floor jack:
http://www.ac-hydraulic.com/uk/index_ws.htm
Check under "Products" and then "Hydraulic Jacks"
The jack is manufactured by a Dutch/English company and they are relatively new to this country. This particular model is rated at 1.3 metric tons (2800 lbs) with a 3.2 inch saddle height and a 28-inch lift height. We have a local distributor here in Phoenix but they are available over the internet. The jack is low enough to fit under the car and there are some nice accessories which increase the utility. I find that this also fits under the wife's Miata with no problems. They are a little pricey but are well made, fit under the car and will lift up to something around 30 inches off the floor.
One word of caution: AC Hydraulics also makes a model DK20HLQ (2.0 metric ton or 4400 lb), which logic would imply is the same unit with a higher load rating. However, DK20HLQ is a completely different design and would not even fit under my big Saturn station wagon. The local distributor here was kind enough to exchange the unit for me.