Where can I buy a pk80/will billet head be available?

I have built several bikes now and I have been watching Pirate cycles about their performance engines and Jims billet head but have yet to see either for sale. I am really wanting to get one or the other and also where can I buy a pk80? I have only seen them available from pirate and they are always out of stock. I just sent Pirate an email about a possible waiting list or something, anyone know anything about the availability of these go fast items?

I am looking for a pk80 because that is the engine that the billet head from Manic will fit. I was just told that the X80 engines I have are the newer version of the pk80 from BGF. From what I understand the pk80 and my x80's are actually 68.5cc engines.

There must be some small differences in the engines as the head is designed for the pk80. I am just having fun with these cheap little engines and I'm happy with what the little engines can do. The cylinder head will complete my engine on my "go fast bike" so I am still patiently waiting. I will be checking in with Pirate on a daily basis in hopes of getting a couple. This is the least expensive motorized hobby I've found and I'm just having fun with it. Justin with Pirate was very quick to respond to my email and like the other vendors I've dealt with that sponser this forum they are great!