You can get a ht kit under $150 bucks, but just barely.
Heres the vendor I use:http://www.ebay.com/itm/370691303944...84.m1439.l2649
More than 10 kits and counting with only one bad coil from the factory which he replaced free as soon as I informed him of the problem.
(zminglu is the same people as well.)
They are NOT BGF!
If more is better, then too much is just enough.
If you can't afford it, build it yourself.