I use the Sperti Vitamin D sunlamp at home during the winter months. It wasn't cheap but wasn't crazy expensive either and seems to be what you want (e.g. UVB).
Well, the 'active ingredient' in these things is the bulb and a reputable brand (Philips medical) runs about 150 euros for a 100w tube with a R17d plug:
You then just need the right ballast for it and a basic timer, maybe a reflector and stand and you're in business. Getting smaller qty is going to be an issue since these suppliers tend to sell in packs of 10.
Apparently the a ballast runs about 70 euros and can power two bulbs.
I might look into it since it's down right affordable compared to the alternatives.
