To be honest theres not much difference between the telescopic hoods as they are the same size through out the brands as they are designed for 60cm wide units so you wont have trouble getting one to replace it.
Have a look at this Hotpoint one as its a decent hood and is the same size as your old one. Its 60cm wide and 30cm depth when closed so its the same as the one you have now.
Or if you want another Bosch model then click here
If you need anymore help on this just get back to me.