Do you know if those grips will fit the 2000 Mega?
Yes they will...........................but, I think you would be better served by the Hogue Cz75 Wrap-around Finger Groove Grips.
Quite a long time ago, I did try the Hogue Handall Slip On Grips on my full size Tanfoglio TA90, and it made the Grip much
too large for my liking. Instead, I found the Hogue Cz75 Wrap-around Finger Groove Grip to be more slimming and comfortable.
At least for my hands, anyways.
Tanfoglio Series 88 TA90
Tanfoglio Armscore RIA MAP1
Both with 19 round Mec-Gar Cz75 Magazines and Hogue Grips