I wouldn't be concerned about the injectors, when mine were flow tested they flowed more than a VL injector . I dont have turbo on it yet , with the standard pressure reg. and a VL fuel pump i'm at about 52% duty cycle , so the injectors flow plenty
I tuned mine on the road with a motec A/F ration meter(hired for a carton of XXXX gold) , could probably find some more if i put it on a dyno. its not that hard to tune . If you cant find a decent computer for under 1500 with all sensors and loom you must be wanting a label queen version you dont need the best Autronic or Motec

mate im looking in the few hundred dollar bracket for a computer (second hand of course), which means ill most likely end up fuel only

sorry I thought you left out a 0 off the end of the 200-250 dont give up yet many conversions are running old VN Commonhore computers these are everywhere just need a pin out diagramm and someone to burn a chip most chip torque agents can
I'll be surprised if you find something in the 200-250 range
I dumped me AMP shares before they nose dived , i was a bit lucky
cheers