www.hondaautomotiveparts.com
I was able to get UCAs through a carquest parts dealer, and can most likely be found via bumper-to-bumper dealers as well.
Here is our current list for known interchangable parts. Many of these have not been personally tested, just listed based on other parts' interchangability. If you find any that don't work, let the moderating team know. We are NOT responsible for you buying parts that don't work and/or fit.
Coilovers:
92-96 Prelude
90-93 Accord
89-01 civics
90-01 integra
Intakes:
92-95 Civic (Dosen't fit alb models)
98-01 Civic
92-96 Prelude (With battery relocation)
94-01 ITR intake (fits with battery relocation)
94-01 Integra LS 3 piece CAI intake *No mods required*
Front Lips:
Early 90 year mazda 626s
88-91 Crx Si
1st gen integra lip (86-89)
2nd gen integra lip (90-93)
94 accord ex fits but with major work, needs to be cut and molded.
Rear Lips:
94 EX honda accord
Side skirts:
94 EX 2 door Accord ( I imagine all accords from that generation since they are the same, wrong?)
92-96 Prelude OEM sideskirts (Just need cut a little)
94-01 Integra Sideskirts
5th Gen Sideskirts (need cut)
Front Bumpers:
90-93 Integra (W/ Slight mods)
Rear Bumpers:
00-01 Civic Ex
Rear Spoilers:
90-93 Integra OEM Spoiler (Just have to trim down the middle support)
(All Years) Pontiac Fiero OEM Spoiler
Maybe 97-01 5th Gen OEM Spoiler
Alternators:
94 Accord 2.2 stock and aftermarket up to 110amp
Acura Legend up to 120 amp
Fuel System:
92-95 Civic Fuel Pressure Regulator
450cc Injectors All OEM Turbo Eclipses/Talons/Laser
Tranmission:
92-96 Si Prelude Quaife LSD (Works on only 90-91 Tranny w/ mods)
Engine Misc:
B-Series Cam Gears
B20b Cams
b18b Cams-b21 only?
Rods from H23
Pistons from B-Series Motor
94-01 ITR stock LSD fits the 90-91 tranny with mods.
H22 dual valve springs (boostedlude3g)
Brake Pads:
Front:
Honda Civic 1990-93 EX
Honda Accord 1989 Coupe Sei
Honda Accord 1988-89 Sedan Lxi/SEi
Acura Legend 1986-90
Rear:
Acura Integra 1994-01 Except Type-R & RS
Acura Integra 1990-93
Honda Accord 1989 Coupe Sei
Honda Accord 1988-89 Sedan SEi
Honda Civic 1990-93 EX
Honda Civic 1994-95 Sedan EX/LX, w/ABS
Honda Civic 1988-96 H.B. 1.5/1.6L CX/DX/Si/VX (w/o ABS)
Honda Civic 1999-00 Si DOHC
Honda Del Sol 1993-97 S/Si w/o ABS 26-200