You can check Yellow Pages for companies that specialize in neon sign production. Other than that, Ebay and Amazon would have plenty of offers available for this.
He should try searching in newspapers to find neon sign makers in his area. A good value for money is "Neon Circus" located in United Kingdom.Also he can choose JantecNeon in USA.
Neon from a neon sign is an element. It has the symbol Ne and is in group 18 which is noble gasses.
Your best bet to find a used sushi neon sign would be eBay.com. Restuarants often use this auction site to list their surplus supplies or sell all their stuff when they go out of business. Besides eBay, try asking your local sushi restaurants if they know of any.
You can purchase a neon Corona sign from eBay, and you might be able to find some on Craigslist. Sometimes people are clearing their garages out and they will sell things like neon beer signs.
There are many places that sell neon open signs. Uline is a distributor of just about anything a business would need and they sell all types of neon signs including open signs.
To build a neon sign factory.
A well made neon sign will last as long it's vacuum remains sealed. So if you can find a used sign which meets your needs there's no reason not to buy it.
Neon is used for a lot of things like neon sign's for business's (like the open/closed sign on Dollar Trees), neon lights are used on air planes to direct them at night, there are things called Neon lamps that can be used in offices, so there are lots of things that are good uses for Neon lights.
The installation of a neon 'open' sign for a store can be as simple as mounting it to a window and plugging it in. But be careful! The neon sign is made from glass and is very fragile!
Neon
Neon signs, by definition, must contain the element neon, which glows when an electric current passes through it (although the term is sometimes more broadly applied to signs containing other nobel gasses). An electric sign is simply any sign that requires electricity. The difference between an electronic sign and a neon sign is electric sign requires electricity to function. On the other hand, neon sign reflects other lights to work.
The configuration of a neon beer sign depends on the size of the sign. The standard neon beer sign uses less power than a 75 watt light bulb. The average neon beer sign uses 120 volt electric plugs and measure roughly 24 by 17 inches.