I think those cylinders are gas-charged. They're not actually 'springs', so you can't dismantle them. The seals eventually leak, & all the nitrogen leaks out.
I've seen them at AutoZoned for about $20 or $25 each, but I was looking for a '89 Saab, not an Integra. They had about 40 different ones for all kinds of Japanese cars, but for my Saab they were special order...