From experience your looking at around £250 which is $375 for the throttle body, injector rail, flanges and brackets.

I run jenvey throttles on two engines, they supply allot of works teams and the quality is great.

They only supply throttle bodies

Your also looking for approx 1 x 600cc pico fuel injector to support upto 125bhp flat out, optimum would be 80% duty so circa 100bhp capable.