I have been reading this group for a few years, and it's rare to have damper (strut) leakage reported on older Hondas. It seems post 1997 Hondas have a much higher occurence of this than older ones like yours. The older Hondas have their own set of unique suspension problems, like the bushings and coil springs failing.
Particularly with the low mileage on this 93 Del Sol I would not expect leakage. Still, according to the archives, damper leaks happen at times on the older Hondas. And you say at least two struts are leaking? That's perhaps no coincidence. I would think age in years, not just mileage is a factor. For your own experience, and if you haven't already, get the wheel off and look at the strut yourself. If you see dust accumulated right beneath the damper joint, that's a sign of oil leaking (then dust accumulating on the oil).
You might consider non-OEM dampers to save some money. Word at this group is that dampers are one item for which OEM is not essential.
One of the regulars here suggested KYB GR-2 struts from http://www.tirerack.com, for one, for my 91 Civic, recently, when I started rebuilding my suspension. (I subsequently disassembled the damper/coil assembly and found my original dampers were fine.)
