Funny this comes up.
I have worked at a Napa store for 23 years... the first 8 full time, and the last (believe it or not) almost 15 just on weekends. I just "retired" from that 2 weeks ago. The Short version...15 yrs ago, I got another job, they wanted me to still work weekends...I got free use of the machine shop, lunch, and parts at cost..and a couple bucks for hobbies, etc.. so I stayed.. new guy bought the store... wasn't a good fit anymore.. so left...now i have time to ride my FJR more
Back on topic..
They were beginning to dabble in more bike stuff in past years, I don't know if you can actually buy them yet (I never sold any) but they do show 30 different part numbers for MC brakes, although they aren't listed for an FJR, and I don't see a reverse reference to work it backwards.
They do have...
Direct fit stuff...(can be "looked up" for your bike):
Oil Filters for a lot, (Napa 7356 is supposed to fit FJR)
Batteries
Spark Plugs
Bulbs
A few starters and alternators.
Echlin coils, wires, sensors, fuel injectors and pressure regs, etc.. but only for Harley's...
Timing belts (only for goldwings)
Relays (not direct lookup for anything but hogs.. but a lot of them cross reference for others)
Repair Manuals
Universal stuff:
Fluids (Valvoline, MC oil, antifreeze, gearlube, greases)
Fuses/wire/wire connectors
Horns
Zip Ties
Valve stems/Tire hardware
Tire repair
Jacks/lifts
Tools
Nuts bolts
Fuel filters
Covers
Toggle/Push button switches
And some automotive stuff that could be modified for use...