Those are the Deltron Din jacks (both the midi and power). They are available in black and silver also.
The classic style is used for power (same DIN5 as midi, had to make this not confusing, dont want to accidentally plug my power into a midi port.) is Deltron 16HR635
The round ones are: Deltron 651
Neither of them are cheap but they are very high quality so for me it's worth it.
The vinyl is this stuff. It is fairly thick but reasonably easy to cut. It sticks like CRAZY though. I used it on my WTPA sampler and made a mistake the first time around and had to remove the label. It was a nightmare to get off, acetone, MEK, heat, practically nothing even made a dent to it. I eventually used a grinder with a stainless steel brush to get it all off. Printing is just like photo paper but it will bleed if you give it too much ink. It comes in white so if you want black, you just have to print in black. A "normal paper" setting on my Canon worked well for me so it was not that hard on the ink. The thing I am not too crazy about is the fact that it is super matte when printed and I have not found a good way to gloss up the finish (tried semi gloss sprays with mediocre results). Also, the trick to applying this stuff since air bubbles are a big problem is to spray the adhesive side with some water with a couple of drops of dish soap. This allows you to slide it around your panel into position but more importantly, you can roll out all the air from underneath it with a roller or squeegee.
White on black is simply print black and the white is what's left. Key caps should work fine, the paper is super durable and water proof but a clear coat probably would be a good idea. Just make sure that you cut it out before you apply it to anything, since it is so thick cutting it after you apply it is difficult and it is easy to make angled cuts into it that leave a torn appearance