As above, you really shouldent be trying to do this on the cheap, the only way to try and save a little money is by doing the fitting etc yourself, but dont scimp on the cost of parts it will come round and bite you in the end, and only undertake DIY fitting if you are a competent mechanic and have the tools/resorses/time and space to do the work.
Why not give bill at badger 5 a shout have a look at his K03 fitment CRT K04 hybrid kit, it may look expensive getting it in one lump kit but you will end up buying most of the bits bill lists and spending the same in the long run anyway, and this set up should give you the power you are after, and you get the after sales
help from bill if there is any issues you aint going to get that from ebay!