Hi,
Finally joined after lurking and finding some answers.
Have a 1992 Honda Civic SI Captiva blue/black.
Original, fairly worn out, driven a long time.

Needs some of the usual repairs, and mostly just want to keep it original.

Where do you get parts?
Online accessible parts catalog for these?

Needs:
New hatch strut stays in the glass (stripped threads).
Radiator that actually fits (recommendation of the various all aluminum ones like those sold on ebay that fit and last best). Radiator is a little too tall (was put in on the road in BFE nowhere when the original let go on a trip).
Bumpers are cracked from being whacked around a little. Source for good used or new genuine or similar.
Fresh genuine wheel covers or painted steelies?
Windshield.
Lower clips and proper materials to reseal removable plastic cowling (leaks around the heater fan). Links for threads and parts?
A/C installed (never had air, but we'd like it).
Moonroof slides too far forward and leaves a gap at the back where it leaks (fix the stops..the seal is nice, but the glass is a little cracked and the little rubber stops at the front are all compressed).

Engine is using some oi (quart every 1500ish?)l, transmission shifts well, but input shaft bearing is going and the clutch chatters. Trans makes a little noise in neutral. Doesn't leak. Has developed a little miss at idle even though plugs are new and cap and rotor are new OE genuine. Plug wires are suspect Altrom things. Valve adjustment? Vac leak? Losing a little compression on one hole?

Is it still possible to get super low mile stock engines from japan with 40-50K miles or a front cut of a car?
It's just a single cam D16Z6, no plans to change it, trusted source for super low mile good condition used ones?
Or cost to correctly rebuild?
Don't want to hack it up or change it radically.
Would install a B18C and part out or buy DelSol parts, but want to keep inexpensive and have it work as a pleasant DD. Doesn't really need to go faster.
Just address some cabin water leaks, rattles, creature comforts and fix it back up again and leave it alone really.

Can some links be provided to get me reading given my goals and some help?
I've mostly repaired Eurotrash cars full time.
Hondas are fairly new. Japanese cars are a little different...fewer electrical problems, scary looking under the hood but somehow works mostly reliably. Thin sheetmetal and lack of rustproofing are my biggest complaints, and I dislike sunroofs, which I gather SI and EX always have.