Not to rain on your parade, and I wish you well on this conversion, but as noted above, there is a model of the early Austin Healy Sprite, which is structurally and mechanically the same as an early-ish MG midget, and has the same doors, cowl, rockers, chassis and a similar windshield...whereas the MGB and the Midget are entirely different vehicles of very different sizes and share practically zero components.
Same door, cowl and rockers apparent below.