[Closed] UV transmitting, Visible absorbing filter. Procurement.

Science suppliers? Lee filters? Rosco? Cokin? Camera shop?

This seems like a reasonable place to start:

http://www.uqgoptics.com/catalogue/Filters/SCHOTT_BANDPASS_FILTERS.aspx

Depends which part of the UV band you're interested in.

don't most cameras have inbuilt UV and IR blocking filters?

I remember seeing some stuff where someone had modded an rx100 to remove the IR filters but it was a pretty involved process.

You could try Edmund optics.
They'll have all sorts of filters but unlikely to be in a standard screw mount photography format. You could try combining a flat glass square filter with a mount like people use for ND filters.
As mentioned above I'm assuming you're already aware digital cameras will have an IR+UV cut filter fitted over the sensor.