iñigo,
Don't worry about your english. Some folks from the U.S. who've written to this site have been far less articulate!
Our (U.S.) Moss catalog shows both normal and Brooklands steering wheels for both MGTF and MGA cars.
Part # 263-250 is the standard type steering wheel as delivered on new MGAs.
Part # 453-165 is the Brooklands type steering wheel which was a popular option.
None of the steering wheels designeed for any T-Series car is compatible with the MGA, due to the keyed splines on the T-Type.
I hope this answers your question. If not, repost and we'll do whatever we can.
Motorbill
From Lola to Land Rover, If it's British and has wheels, it's likely I've bloodied me knuckles thereupon