steering to left when accelerating?, whats causing this? Options

[2bcelica]

hi - hope you guys can help me out -

i recently replaced all four bearings - front strut mounts - driver side axle - and had a wheel alignment -
- my car is now pulling to the left when accelerating - if i hold the steering wheel firmly then its not really noticeable, but if i hold it freely then it is - I took it to a local shop and they thold me that the front control arm bushings is probably causing the problem -

Is that correct that the control arm bushing could cause this problem? Is this a part that I can replace or do I have to replace the entire control arm (assuming bushing comes with it), because when I searched parts catalog on https://www.1sttoyotaparts.com/partscat.html it does not have it.