Hmm that I am not sure. I scrolled through his site and hit the order button and said he's all out of stock and doesn't plan to make anymore. You could always try contacting him and see what he says or if he has plans to make another batch in the future.
FYI: Above guide, the trick NLA SKBOWE unit, and a significant amount of research into P1 lighting upgrades was done by forum member "theshadow27". He is a legend, a gentleman and a scholar. You can take any post or content from him as gospel.
My personal recommendation: get yourself some sweet Gen2 Bosch AL projectors, used on ebay from one of the models listed in the selection guide. Get a decent 55w HID kit and some 4500k bulbs. The above guide has great suggestions and input on choosing parts. Bulb quality does make a big difference for HID stuff, so something like an Osram Night Breaker will be much better than a bargain chinese bulb that comes with a $40 balast kit.
I was one of the people to experience problems with the H9 swap: arcing and brittle wires.
The wires went bad probably because one of my headlight housings was aftermarket and had cheapo wiring whose insulation started to flake at the ends, probably poor quality exacerbated by the extra heat. Resolved that with heatshrink tubing.
The arcing happened after I had done the bulb mod to make the H9 fit the H11 socket, which I guess made it sit imperfectly, because with time it moved about enough to arc and fry the entire plug. I should point out that I had done the mod properly with a dremel, and couldn't tell any fit issues on install - everything seemed tight.
I bought a set of H9 sockets, cut the old H11 ones out, and soldered the H9 ones in. Much happier with this setup - the little "clips" that hold in an H9 are so much more robust than the flimsy equivalents on an H11 socket, no arcing issues, and H9 bulbs fit with no questionable mods. Been running with this for a solid while and no issues to report.