Actually, I've just spent ~$11000 on tuner modules (a little more than 200 units), which required a bank loan and a lot of negotiating with the suppliers. The main problem with the supply is that the factory in Manila will:

A) Only supply in bulk, and
B) only to reqular customers for that product, and
C) makes the product to order, which explains A, and
D) only has about 5 or 6 customers worldwide for that particular product

I am, in fact, the only customer in Europe for the damn things. And, of course, take by far the smallest quantity. Everyone else who uses them is basically a car manufacturer, since the module was designed for automotive use. The cost of the things has been steadily going up, and the availability down, since the project started, and I only got them this time because one of the other customers placed a very large order which started the ball rolling. I have received the first 50 modules, and the balance will arrive sometime around 2 months from now. I expect that in fact this will be the last batch I can get.

As of order 305 the cost will have to go up by 10 GBP to cover the extra cost of the modules, which are now about 60% more expensive than when I set the price originally. The web site will be altered to reflect this in the next couple of days. I will have modules in sufficient quantity to fulfil orders to around 400 or so, but after that I'm not sure what the situation will be.

pca
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Experience is what you get just after it would have helped...