There's no readily available, precise number for the total production of red magnetic 1999 Corvette convertibles. GM's production records don't typically break down numbers to that level of specificity (year, model, *exact* color). "Magnetic Red" itself may have had variations in name across different model years or internal GM codes.
To find even an estimate would require extensive research through Corvette enthusiast clubs, archives, or possibly contacting GM directly (though they may not have that level of granular data retained).
