I agree -- eBay's a good source. Also, for a safelight, consider a simple red bulb, such as this one, this one, or even this LED one (you'd want the red version). Oddly, the LED bulb is less expensive than one of the tungsten bulbs. Note that some red bulbs intended for use as decoration don't completely cover the bulb or use a coloring that doesn't block all the non-red light, so not all such bulbs are suitable for use as safelights. Those sold by photo retailers should be OK, though, and a lot of people here (including me) are now using red LEDs as safelights with good success.
If you get an enlarger but it lacks a lens, send me a PM -- I've got a couple of spares.