I have owned 02 JDMs, luckily, never faced any spare parts issues.
I twice visited Chah-E-Sultan, Rawalpindi, and as per my observations, I do not think that JDMs spare parts like Bonnet, Lights, Doors, Bumpers, windscreens, etc. are available from the markets / scrapyards / junkyards, etc. in brand new condition!
All which would be available would be used, Kabuli, stolen from other cars, scrapped, etc. and in very high prices, like muu mangay daam.
To conclude in a nutshell, will be in used condition only! (Very rare in brand new)
Its a fact, which we all should admit.
Yes, some parts, like filters, gaskets, bearings, etc. which come in routine maintenance, may be available in brand new condition, but again, for off-market cars, they may be hard to find.