I should have thought to try ebay for LED bulbs. I've got a couple of these in use, but they were pricey relative to what you paid. They also show a bit of yellow/orange and green when looked at with a CD. So I wrapped them in rubylith and they work very well. I have tested them with paper out to 10 minutes from just a foot away when used this way and they showed no problem. I did not test them without the RubyLith. They are very bright.

I don't think any of the red LEDs are only going to be a pure red, so you may want to get a few big sheets of rubylith. The same LED viewed through rubylith shows only a red spectrum. I just taped the rubylith to the bulb with clear packing tape; not pretty, but effective.