what speedo to get, ideas please,

[rondoolaa]

I run a Novak gtb with a Novak 5.5 motor in my b4,

I would like to get another Speedo, as a spare,
Ideally another Novak gtb,
What I'd like to know is, if I can't get another Novak gtb then what is a good Speedo to get that is like the gtb and will handle the 5.5,

I don't want to spend too much and need some ideas on a popular reliable and cheap Speedo,

Thanks,