Modern-Aire makes semi-custom and fully custom powder-coated hoods as well as any metals you care for including stainless. The semi-custom are set shapes and sizes where you choose metals, colors, banding, etc., but they'll make anything you or your designer specify.

No, it is not possible to tap off the range circuit. Nor is it possible to tap into a kitchen receptacle circuit. If this is just a range hood you can take power from a local lighting circuit. If it is an over-the-range micro/hood then it requires it's own dedicated circuit.

The only difference I see is the filters at the bottom where the air goes thru, going up into the hood. One has mesh & the other is....I may be wrong on the name, but....baffles(?). I have no idea if that makes a difference in the filtering process or drawing the air up, or maybe the cleaning? I'd look into that & see if one is better than the other. Otherwise, go w/ the cheaper one! I've ordered many things on ebay & have yet to have a problem. Good luck!

Ventahood can do a pretty large range of custom options. If you can find the RAL color code for the ILVE range many makes can match it. Modern-Aire will do it as well. Abbaka is beautiful but significantly more expensive then most others. Their attention to detail is pretty much second to none and their range of customization is ridiculous Rangecraft also has a solid custom range option. Trevor from Eurostoves does a solid job with Modern-Aire. He might be a good resource to get you on the road.