Here is a buy it now link for a relatively cheap bulb:
http://www.ebay.com/itm/H16-Pure-Whi...54b116&vxp=mtr
$5 a piece ain't bad, but if you want to go lower you'd have to bid for it. Search "PSX24W LED" on ebay and there are a ton of bids starting around $2. The only problem is that the nubs on the housing are incorrect, so you have to shave off the single nub with a blade. In hindsight, I should have taken a picture of that too.
I got the CG lock a few years back, for my AW11 MR2 where I couldn't use the "lean and lock" trick because the slack on the seatbelt was terrible. After driving around with it last night and this morning, it doesn't do much for the BRZ. I took it off a few minutes ago, I'll try it out at the next autocross and see if it's beneficial and let you know if it's worth it.