Startime supply makes a very nice 116 crystal for a very reasonable price - you can get a temp 2 week account with no questions asked (also, if you place a big enough order your first time around, say > $200, you'll get a permanent account - worked for me). Gens can be had for around $50-$75 (check fleabay)... I have a gen with a couple of cracks (still air tight) I am happy to let you have on the cheap
Regarding fading the bezel insert, my technique (which I have used on gen and rep inserts, 1675s included) is to make a weak lye and water bath (stir about 1/2 tsp into 2oz water), tie some thread around the insert (so you can pull it out quickly) - the clear coat on the top will come off slowly, then the color will start to fade REALLY FAST (depending on your concentration of lye - practice on a cheapie insert first with your solution, watch the clock)... You probably want to stop before the color actually starts to fade (it will continue after you pull it out - there's no harm in pulling it and putting it back in), then immediately rinse thoroughly - taking a towel or sponge to it will rub off more color - I do this gently and evenly... What you're left with has the right color, but the finish will look off... Spray it with some glossy acrylic sealer and it'll look as close to a real aged insert as I've ever seen.