Rips,
I can see where your frustration lies - if it helps, it was my experience too, I spoke to Laurie in January and got the engine in July. I left many messages which didn't get a response, but he will respond ... and its quite likley that he's either been collecting stuff for your build (he did for me) or he's practically finished the thing but just forgot to let you know.
I've dealt with a few so called specialists since i got my bus, and some have left me cold over their service. Laurie isn't one of those - he's eccentric (and, almost by definition, thinks he's completely normal) but, i think, he does a bloody good job, doesn't charge anything liek what some poeple will, and produces a good product.
For me, the wait for what i think is good quality was worth it - there are several on here who will say the same, but i guess it won't work for all. The other thing that swung it for me was personal accounts of how he looks after people even if there are problems after it's been installed - even if the problem isn't of his making or, i've heard, when the engine was not one of his.
Not sure where this leads either, but don't make a decision that you might regret later