Although I DO tend to agree with:
I do think that your assessment of the seller was remarkably accurate,
because of Seller's Q & A "answers", he does IN FACT say:
HERE WE HAVE A AWESOME MINT PERFECT CONDITION VERY LIGHT WEIGHT FULL FRONT
EUROPA, SEBRING FIBERGLASS FRONT CLIP FOR ALL AUSTIN HEALEY SPRITES AND MG
Note that he says NOTHING there ref a MGB.
Now I must admit, I cannot fathom how it would "fit" a "B"?!?!?!?