Just use a high ozone producing UV lamp. They are powered by AC mains and some of them have bases just like an ordinary full sized incandescent light bulb so you can use something like an extension cord / work light with a metal hood and ceramic / metal bulb socket as are common and inexpensive.
The bulbs are fluorescent light bulbs with integrated ballast circuits like normal visible compact fluorescents but they produce hard UV light and lots of ozone for the correct types. As they are light bulbs they burn out after some hundreds of hours use or whatever depending on the care / handling of them and how many start / stop cycles you put them through.
Many germicidal / UV lamps are specifically designed not to put out a lot of ozone, so you want the type that isn't.
Ozone producing bulbs are also used in household air conditioning systems as well so I suspect you could buy some bulbs / fixtures from an HVAC place.
Some ozone producing bulbs do not include a ballast circuit and they mount more like small linear fluorescent tubes in which case you need a ballast and mount for the tubes.
But the bulbs are usually inexpensive, i.e. less than $50 US, more like $20 depending on type / source. And the light fixtures / ballasts if not integrated are usually not so expensive as well, e.g. under $100.
Anyway the bulbs produce a lot of UV as well as ozone so they will cause plastics and other sensitive surfaces to be bleached and degraded by the light and chemical action so you should use a non suscepible mount as I recommended (metal / ceramic parts exposed). And you should use care that the light doesn't spill out onto any surface that will be degraded by it. You can stick the thing into a box with a blower fan blowing air through it into a duct or something if you want.
I know UV light produces ozone - But they are quite expensive here in Europe.
They also have to be screened, so no one gets hurt.
I made these for a fish farm - The UV tubes are 130W, they can and will cause arc eyes (photokeratitis) in a minute.
The problem is, they are very expensive, fragile, and to create a housing for them, it's not the way to go i think.
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