Short answer: No, long answer is you need to try and find the answer to your question, before you ask. (cudo's for getting it in the correct forum though)
You've got alot of reading to do.
The reason you would replace factory gauges, is to be more accurate and precise. If you like that style of gauge, I would check VDO and stewart warner.
measure them up do some math, its most likely gonna be 1.5 coils. Just save up for a set of good lowering springs and if the stock springs are in that good of shape, sell them.
lol, still in the high 80's and sunny here.. we dont get snow, rain or ice down here, just sand storms, wind and it drops into the high 30's. max. rust is almost non existent in this part of cali.
You could use that, or a regular 3 position switch for the signals and a 2 position switch for the hazards. I'm almost done completely rewiring my car from scratch and thats what i did.