sorry my friend for not responding any time earlier than this but for a few days i have been feeling ill and have been missing in action online. nice luce, right there
@xulfiqar is correct with his information on the propeller shaft on mazda 1500s. the factry part no. for center bearing is 99606 62050 according to my parts manual
quarter vent window gaskets are hens teeth, not just around here but across the globe. even thailand couldn't be of help which is known to be the biggest source of 1500 rubbers
if you want to lower it a tad without changing front springs, you might have to hack two coils off the coil springs up front with a grinder. for rear you can flip a toyota hi-ace spring leaf over the top of your stock leaf springs to lower the rear a couple of inches
what hinge parts are you after? i might know a source who has some. i can put you in touch with him
i think i have a spare pair of NOS side markers here somewhere but i will have to find them first as i have recently shifted shops
i hope this helps. good luck with your restomod