Hello there, i've done both mods you've mentioned.
Here's a link for the spoiler I bought, £80, free delivery and I had to pay £20 import tax. I couldn't recommend it enough really, delivery time was quoted of up to 30 days but I recieved mine in 4, that's right, painted and delivered from Taiwan in 4 days - efficient. The paint job is also brilliant, good colour match and very few imperfections, I have a very keen set of eyes and I was pleased.
http://www.ebay.co.u...984.m1497.l2648
With regards to the facelift rear lights, I too have done this mod, the lights are interchangeable, the plugs for the wires and the bolts are in the same place. However, the shape of the bootlid behind the lights is a different shape, requiring some cutting of the bootlid behind where the lights sit - not for the faint hearted. I've replaced just the inner lights so far (with the flick shaped reverse light section) these seem hard to get hold of, taking me a good few months of checking eBay to find them. I'm not sure how interchangeable the outer lights are, i'm still waiting for some to come up, using a combination of new and old is fine for the time being but the shut lines aren't exact and i'm very anal about shut lines (typical Lexus owner, the persuit of perfection and all that)
Hope this helps. =D
Pictures: