Walmart carries a fluorescent fixture and bulb (AC) for $10 and it's the right wavelength.
The 4AA cell fluorescent fixtures that use a 4 inch bulb that are very common, work well, too. You can usually find the bulb with the bug zapper replacements. They are the correct wavelength.
The other thread referred to has some good info. Someone commented that the Norland does not have inhibitors in it, so as long as it is exposed to UV, it will eventually cure.
I used Dymax resins almost 20 years ago when I started repairing windshields and those resins have inhibitors in them that stop the curing process to prevent yellowing of the resin longterm. With those resins, it is important that the initial cure is good and typically 5mm LEDs are not going to do the job. The resin can appear to be hard on the outside or to the touch, but not be properly cured.