You can still pick up the TA04R Kit which is excellent value and a top performing car for $190USD. If its the TA04TRF that you want then You can get one for around $259 USD....
If you can afford the extra get the TRF version.
I see you originally mentioned the TA04 which is the base model. Don't waste your money on the standard TA04.. Get either the TA04R or the TA04TRF.
The TA04R performs extremely well and will hang with the best. I find it to be a very easy car to set up and drive. It is very well made and will cope with a bit of a battering if this is your driving style
It already has most of the Hop Ups you will want to get the car performing, although I would recommend the Carbon Damper Stays for Front and Rear as well as the Delrin Outdrives.