Don't have any suggestions for the flashlight but I would recommend grabbing some yellow & orange glasses to go with whatever you get.
I have a UV LED Listed as 1W 395~410nm & glasses really brings out a lot of fluorescence that is normally too overpowered by purple light to see at all.
Both yellow & orange is useful. Yellow doesn't effect your color vision as much but it doesn't always block enough purple for faint spots.
Uvex SCT-Orange $8.37 are really good & have a transmission chart that shows it blocks 200nm through 532nm. They are even used as cheap laser glasses by some people. Tho there are much cheaper safety or shooting glasses available.